Consulta: creatorFacets:"Lentz, R.D."
Registros recuperados: 92
Data/hora: 16/06/2024 10:19:39

PAM and straw residue effects on irrigation furrow erosion and infiltration
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Bjorneberg, D.L.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Sraw residue; Polyacrylamide; Straw residue; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 2001
URL: http://eprints.nwisrl.ars.usda.gov/889/1/1036.pdf

Soil property patterns and topographic parameters associated with ephemeral gully erosion
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Dowdy, R.H.; Rust, R.H.
Tipo: Article
Palavras-chave: Erosion; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1993
URL: http://eprints.nwisrl.ars.usda.gov/602/1/814.pdf

Polyacrylamide sprayed on soil surfaces can stabilize soil aggregates
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Kincaid, D.C.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Water-soluble PAM (WSPAM); Soil; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/872/1/894.pdf

Dairy Manure Nitrogen Availability in Eroded and Noneroded Soil for Sugarbeet Followed by Small Grains
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.; Brown, Bradford; Johnson-Maynard, J.; Leytem, A.B.
Efficient recycling of abundant manure resources from regional dairy industries in the semiarid West requires a better understanding of N availability in manure-amended soils. We measured net N mineralization using buried bags, and crop biomass, N uptake, and yields for sprinkler-irrigated, whole (noneroded) and eroded Portneuf soils (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) subject to a one-time manure application. Treatments included a control, fertilizer, two rates of composted dairy manure (28.4, 64.3 Mg ha–1, dry wt.), and two rates of stockpiled dairy manure (23.3, 45.7 Mg ha–1, dry wt.) applied in the fall before the Year 1 cropping season. Plots were planted to sugarbeet (Beta vulgaris L.), winter wheat (Triticum...
Tipo: Article
Palavras-chave: Manure; Amendments; Nitrogen.
Ano: 2011
URL: http://eprints.nwisrl.ars.usda.gov/1420/1/1390.pdf

Solute response to changing nutrient loads in soil and walled ceramic cup samplers under continuous extraction
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Article
Palavras-chave: Chemistry; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 2006
URL: http://eprints.nwisrl.ars.usda.gov/37/1/1188.pdf

Long-term polyacrylamide formulation effects on soil erosion, water infiltration, and yields of furrow-irrigated crops
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Article
Palavras-chave: Infiltration management; Erosion control; Application Strategies; Water-soluble PAM (WSPAM).
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1314/1/1291.pdf

Contrasting effects of biochar versus manure on soil microbial communities and enzyme activities in an Aridisol
Provedor de dados: NWISRL Publications
Autores: Elzobair, K.A.; Stromberger, M.E.; Ippolito, J.A.; Lentz, R.D.
Biochar has been shown to increase microbial activity, alter microbial community structure, and increase soil fertility in arid and semi-arid soils, but at relatively high rates that may be impractical for large-scale field studies. This contrasts with organic amendments such as manure, which can be abundant and inexpensive if locally available, and thus can be applied to fields at greater rates than biochar. In a field study comparing biochar and manure, a fast pyrolysis hardwood biochar (10 tons per acre), dairy manure (19 tons per acre), a combination of biochar and manure at the aforementioned rates, or no amendment (control) was applied to an Aridisol (n=3) in fall 2008. Plots were annually cropped to corn.  Surface soils (0-12 inches) were sampled...
Tipo: Article
Palavras-chave: Chemistry; Fertility; Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1599/1/1557.pdf

Polyacrylamide application to control furrow irrigation-induced erosion
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Application Strategies; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/863/1/890.pdf

Software utilizing Imhoff cone volumes to estimate furrow-irrigation erosion
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Foerster, J.A.
Tipo: Article
Palavras-chave: Erosion; Erosion; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/625/1/847.pdf

PAM in irrigated agriculture: Processes and soil-PAM interactions influencing canal sealing
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Seepage reduction.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1316/7/1293.pdf

Hardwood biochar influences calcareous soil physicochemical and microbiological status
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Stromberger, M.E.; Lentz, R.D.; Dungan, R.S.
The effects of biochar application to calcareous soils are not well documented. In a laboratory incubation study, a hardwood-based, fast pyrolysis biochar was applied (0, 1, 2, and 10% by weight) to a calcareous soil. Changes in soil chemistry, water content, microbial respiration, and microbial community structure were monitored over a 12-month period. Increasing biochar application rate increased the water holding capacity of the soil-biochar blend, a trait that could be beneficial under water limited situations. Biochar application also caused an increase in plant-available iron and manganese, soil carbon content, soil respiration rates, bacterial populations, and a decrease in soil nitrate-nitrogen concentration. Biochar rates of 2 and 10% altered the...
Tipo: Article
Palavras-chave: Calcareous soil; Nitrogen; Nutrients.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1532/1/1490.pdf

Net Nitrogen Mineralization from Past Years' Manure and Fertilizer Applications.
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
Manure from the semiarid West’s dairy industries is a rich nutrient source, but its use for crops can be problematic because soil N availability from manure may vary substantially depending on the year of application.  Experimental plots established in Idaho on a Portneuf silt loam (coarse silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) included six manure treatments and two non-manure treatments with four replicates.  The six manure treatments included combinations of two manure rates, Man-1x (0.31 Mg total N/ha) and Man-3x (0.97 Mg total N/ha) applied in the fall either 1, 2, or 3 years previously.  The two non-manure treatments were urea fertilizer applied per soil test (Fert) and a control with no amendment. We measured net N...
Tipo: Article
Palavras-chave: Manure; Fertilizer; Soil.
Ano: 2012
URL: http://eprints.nwisrl.ars.usda.gov/1455/1/1420.pdf

Applying Polyacrylamide (PAM) to Reduce Erosion and Increase Infiltration Under Furrow Irrigation
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Stieber, T.D.; Sojka, R.E.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Polyacrylamide; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/1071/1/871.pdf

Biochar elemental composition and factors influencing nutrient retention
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Spokas, K.A.; Novak, J.M.; Lentz, R.D.; Cantrell, K.B.
Biochar is the carbonaceous solid byproduct of the thermochemical conversion of a carbon-bearing organic material, commonly high in cellulose, hemicelluloses, or lignin content, for the purposes of carbon sequestration and storage.  More specifically, the thermal conversion process known as pyrolysis occurs when carbon-containing substances are introduced to elevated temperatures in the absence of oxygen at varying residence times, yielding biochar.  Several pyrolysis techniques employed to produce biochar differ in the temperature of reaction and residence time in the reactor.  Different reactor residence times are described as slow (hours to days), fast (seconds to minutes), and flash (seconds).  Fast or flash pyrolysis typically occurs around 500oC with...
Tipo: Book Section
Palavras-chave: Fertility; Soil quality; Fertilizer.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1590/1/1547.pdf

Field results using polyacrylamide to manage furrow erosion and infiltration
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Article
Palavras-chave: Polyacrylamide; Polyacrylamide; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/628/1/850.pdf

Automated system for collecting multiple, sequential samples from soil water percolation samplers under continuous vacuum
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Article
Palavras-chave: Percolation sampler; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 2006
URL: http://eprints.nwisrl.ars.usda.gov/29/1/1178.pdf

Polyacrylamide (PAM) for irrigation runoff management
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Entry, J.A.; Bjorneberg, D.L.; Morishita, D.
Tipo: Conference or Workshop Item
Palavras-chave: Runoff losses; Runoff; Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/963/1/1215.pdf

Polyacrylamide decreases furrow erosion
Provedor de dados: NWISRL Publications
Autores: Trout, T.J.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1993
URL: http://eprints.nwisrl.ars.usda.gov/866/1/807.pdf

Polyacrylamide treatments for reducing seepage in soil-lined reservoirs: A field evaluation
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Kincaid, D.C.
Irrigation water supplies are becoming limited, and there is a need to extend the usefulness of current water resources. Previous laboratory studies demonstrated that certain water-soluble polyacrylamide solution (WSPAM) and cross-linked PAM granule (XPAM) treatments effectively reduced infiltration into soils. We evaluated the efficacy of these treatments for reducing water seepage losses in an unlined irrigation reservoir. Five treatments were applied to plots on the lower side slopes of a reservoir basin before it was filled in April 2001: controls; 0.016 kg m -2 WSPAM (1000 mg L -1 solution); 0.2 kg m -2 XPAM + 0.13 kg m -2 NaCl; 0.4 kg m -2 XPAM + 0.13 kg m -2 NaCl; and 0.8 kg m -2 XPAM only. Ring-cylinder seepage meters installed in each experimental...
Tipo: Article
Palavras-chave: Water management.
Ano: 2008
URL: http://eprints.nwisrl.ars.usda.gov/1272/1/1249.pdf

Nitrogen Availability From Manure in Years Following a One-Time Application
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
Manure from the semiarid West’s dairy industries is a rich nutrient source, but its use for crops can be problematic because soil N availability from manure may vary substantially depending on the year of application.  Experimental plots established in Idaho on a Portneuf silt loam (coarse silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) included six manure treatments and two non-manure treatments with four replicates.  The six manure treatments included combinations of two manure rates, Man-1x (277 lbs total N/ac) and Man-3x (866 lbs total N/ac) applied in the fall either 1, 2, or 3 years previously.  The two non-manure treatments were urea fertilizer applied per soil test (Fert) and a control with no amendment. We measured net N...
Tipo: Article
Palavras-chave: Manure; Nitrogen; Soil.
Ano: 2012
URL: http://eprints.nwisrl.ars.usda.gov/1447/1/1412.pdf

Five-year research summary using PAM in furrow irrigation
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Technical Bulletin
Palavras-chave: Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1196/1/916.pdf

Biochar and manure effects on nitrogen nutrition in silage corn
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Ippolito, J.A.; Spokas, K.A.
Aluminum-based water treatment residuals (Al-WTR) have a strong affinity to sorb phosphorus.  In a proof-of-concept greenhouse column study, Al-WTR was surface-applied at 0, 62, 124, and 248 Mg/ha to 15 cm of soil on top of 46 cm of sand; Al-WTR rates were estimated to capture 0, 10, 20, and 40 years of phosphorus from an urban watershed entering an engineered wetland in Boise, Idaho, USA.  Creeping red fescue (Festuca rubra) was established in all columns; one set of columns received no Al-WTR or plants.  After plant establishment, once per week over a 12-week period, ~1.0 pore volumes of ~0.20 mg phosphorus/L was added to each column.  Infiltration rates were measured, leachate was collected and analyzed for soluble phosphorus, and fescue yield,...
Tipo: Article
Palavras-chave: Chemistry; Soil quality.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1592/1/1550.pdf

Inhibiting water infiltration with cross-linked polyacrylamide: Seepage reduction for irrigated agriculture
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
High water infiltration rates in unlined canals, reservoirs, and the inflow end of furrows relative  to outflow ends result in excessive seepage losses and reduced furrow irrigation application uniformity.  This study evaluated the use of cross-linked, anionic, polyacrylamide hydrogel (XPAM), a  water-absorbing, swellable polymer solid, for reducing infiltration and seepage losses though soil.  Experiments 1 and 2 measured the influence of soil treatments on seepage rate in soil columns  under constant-head conditions: Exp. 1 treated five soils with 0, 2.5, 5, and 10 g kg -1 XPAM; Exp.  2 applied combined XPAM (0-5 g kg-1) and NaC1 (0-5.1 g kg-1) treatments to a silt loam soil,  and separately tested the effect ofXPAM granule size and treated soil layer...
Tipo: Article
Palavras-chave: Polyacrylamide; Cross-linked (hydrogel) PAM; Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/62/1/1226.pdf

Influence of polymer charge type and density on polyacrylamide ameliorated irrigated furrow erosion
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Carter, D.L.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1993
URL: http://eprints.nwisrl.ars.usda.gov/1060/1/789.pdf

Irrigating with polyacrylamide (PAM) - Nine years and a million acres of experience
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Shainberg, I.; Trout, T.J.; Ross, C.W.; Robbins, C.W.; Entry, J.A.; Aase, J.K.; Bjorneberg, D.L.; Orts, W.J.; Westermann, D.T.; Morishita, D.W.; Watwood, M.E.; Spofford, T.L.; Barvenik, F.W.
Tipo: Conference or Workshop Item
Palavras-chave: Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 2000
URL: http://eprints.nwisrl.ars.usda.gov/943/1/1022.pdf

Nitrogen Availability and Uptake by Sugarbeet in Years Following Manure Application
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
The use of solid dairy manure for sugarbeet production is problematic because beet yield and quality are sensitive to deficiencies or excesses in soil N, and soil N availability from manure varies substantially depending on the year of application. Experimental treatments included combinations of two manure rates (0.33 and 0.97 Mg total N ha-1) and three application times, and no manure treatments (control and urea fertilizer). We measured soil net N mineralization and biomass, N uptake, and yields for sprinkler-irrigated sugarbeet. On average, the 1-year-old, low-rate manure, and 1- and 2-year-old, high-rate manure treatments produced 1.2-fold greater yields, 1.1-fold greater estimated recoverable sugar, and 1.5-fold greater gross margins than that of...
Tipo: Article
Palavras-chave: Sugarbeet; Manure; Nitrogen.
Ano: 2012
URL: http://eprints.nwisrl.ars.usda.gov/1454/1/1419.pdf

USDA-ARS perspective on PAM
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Percolation water; Application Strategies; Runoff; Water-soluble PAM (WSPAM).
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1315/6/1292.pdf

Polyacrylamide in furrow irrigation, an erosion control breakthrough
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1079/1/904.pdf

Biochar and manure effects on net nitrogen mineralization and greenhouse gas emissions from calcareous soil under corn
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Ippolito, J.A.; Spokas, K.A.
Few multiyear field studies have examined the impacts of a one-time biochar application on net N mineralization and greenhouse gas emissions in an irrigated, calcareous soil; yet such applications are hypothesized as a means of sequestering atmospheric CO2 and improving soil quality.  We fall-applied four treatments, stockpiled dairy manure (42 Mg/ha dry wt.); hardwood-derived biochar (22.4 Mg/ha); combined biochar and manure; and no amendments (control).  Nitrogen fertilizer was applied in all plots and years based on treatment’s pre-season soil test N and crop requirements, and accounting for estimated N mineralized from added manure.  From 2009 to 2011 we measured greenhouse gas fluxes using vented chambers, net N mineralization (NNM) using buried bags,...
Tipo: Article
Palavras-chave: Corn; Manure; Chemistry; Nitrogen; Soil.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1558/1/1514.pdf

Influence of irrigation water quality on sediment loss from furrows
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Carter, D.L.
Tipo: Conference or Workshop Item
Palavras-chave: Erosion; Sediment; Water quality; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/1065/1/827.pdf

Nutrient loads and sediment losses in sprinkler irrigation runoff affected by compost and manure
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Lentz, R.D.; Westermann, D.T.; Kincaid, D.C.
High water application rates beneath the outer spans of center pivot sprinkler systems can cause runoff, erosion, and nutrient losses, particularly from sloping fields.  This study determined runoff, sediment losses, and loads of nutrients (dissolved organic C, Nitrate-N, ammonium-N, total phosphorus [TP], ferric-oxide strip phosphorus [FeO P], dissolved reactive phosphorus [DRP], K, Ca, Mg, and Na) in sprinkler runoff for two years after a single application of either stockpiled or composted dairy manure.  The two-year field investigation studied five treatments, including a non-amended control, in each of six blocks, with each block situated under a different span of a moving-lateral sprinkler system.  In October 1999, we incorporated 29.1 or 71.7 Mg/ha...
Tipo: Article
Palavras-chave: Sprinkler irrigation; Composted manure; Runoff.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1559/1/1515.pdf

Monitoring software for pollutant components in furrow irrigation runoff
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Conference or Workshop Item
Palavras-chave: Runoff losses; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/912/1/903.pdf

Automated Imhoff cone calibration and soil loss/infiltration analysis for furrow irrigation studies
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Conference or Workshop Item
Palavras-chave: Infiltration; Runoff losses; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/1066/1/830.pdf

A PAM primer: A brief history of PAM and PAM-related issues
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Technical Bulletin
Palavras-chave: Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1194/1/914.pdf

Polyacrylamide and biopolymer effects on flocculation, aggregate stability, and water seepage in a silt loam
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Researcher’s seek a more renewable and natural alternative for water soluble anionic polyacrylamide (PAM), a highly-effective, petroleum-derived polymer used in agriculture to control erosion and reduce water seepage from unlined irrigation structures. This study evaluated two anionic polymers: a bacteria-produced polysaccharide (biopolymer) with 10-20 Mg/mol molecular weight (MW) and 30% charge density, and a PAM (12-15 Mg/mol MW, 30% charge density) to compare their ability to flocculate soil colloids, stabilize soil aggregates, and influence effective hydraulic conductivity (seepage loss). The biopolymer most effectively flocculated the colloids at a concentration of 1 mg/L, but was still 30% less effective than PAM at 1 mg/L and 50% less effective than...
Tipo: Article
Palavras-chave: Water-soluble PAM (WSPAM); Erosion control; Erosion; Soil; Water.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1583/1/1539.pdf

Nutrients in Runoff from a Furrow-Irrigated Field After Incorporating Inorganic Fertilizer or Manure.
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
Use of dairy manure to supply crop nutrients is gaining broader acceptance as the cost of fertilizer rises; however, there are concerns regarding manure’s effect on water quality. In 2003 and 2004, we measured sediment, NO3-N, NH4-N, K, dissolved reactive P (DRP), and total P (TP) concentrations in runoff from furrow irrigated field plots (6-7 irrigations/y). Annual treatments included: (M) 13 to 34 Mg/ha stockpiled dairy manure; (F) 78 to 195 kg N/ha inorganic N fertilizer; or (C) control--no amendment. Available N in manure applied each year was similar to amounts applied in fertilizer. Constituent concentrations (mg/L) in runoff ranged widely: sediment, 10 to 50,000; NO3-N, 0 to 4.07; NH4-N, 0 to 2.28; K, 3.6 to 46.4; DRP, 0.02 to 14.3; and TP, 0.03 to...
Tipo: Article
Palavras-chave: Manure; Runoff.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1400/1/1370.pdf

Biochar: A valuable soil amendment
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Lentz, R.D.; Novak M, J.
Tipo: Article
Palavras-chave: Soil; Amendments.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1350/3/1327.pdf

Toxicity of various anionic polyacrylamide formulations when used as erosion control agents in agriculture
Provedor de dados: NWISRL Publications
Autores: Weston, D.P.; Lentz, R.D.; Cahn, M.D.; Ogle, R.S.; Rothert, A.K.; Lydy, M.J.
Tipo: Article
Palavras-chave: Erosion control.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1307/1/1284.pdf

Polyacrylamide and straw residue effects on irrigation furrow erosion and infiltration
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Bjorneberg, D.L.
Tipo: Article
Palavras-chave: Polyacrylamide; Sraw residue; Polyacrylamide; Straw residue; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 2003
URL: http://eprints.nwisrl.ars.usda.gov/174/1/1118.pdf

Reducing furrow irrigation erosion with polyacrylamide (PAM)
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Article
Palavras-chave: Polyacrylamide; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1997
URL: http://eprints.nwisrl.ars.usda.gov/678/1/937.pdf

Addition of activated switchgrass biochar to an aridic subsoil increases microbial nitrogen cycling gene abundances
Provedor de dados: NWISRL Publications
Autores: Ducey, Tom; Ippolito, J.A.; Cantrell, K.B.; Novak, J.M.; Lentz, R.D.
It has been demonstrated that soil amended with biochar, designed specifically for use as a soil conditioner, results in changes to the microbial populations that reside therein. These changes have been reflected in studies measuring variations in microbial activity, biomass, and community structure. Despite these studies, very few experiments have been performed examining microbial genes involved in nutrient cycling processes. Given the paucity of research in this area, we designed a six-month study in a Portneuf soil (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) treated with three levels (1%, 2%, and 10% w/w ratio) of a biochar pyrolyzed from switchgrass (Panicum virgatum) at 350°C and steam activated at 800°C to measure the...
Tipo: Article
Palavras-chave: Amendments; Chemistry; Nitrogen; Soil.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1517/1/1481.pdf

Polyacrylamide Effect on Furrow Erosion and Infiltration
Provedor de dados: NWISRL Publications
Autores: Trout, T.J.; Sojka, R.E.; Lentz, R.D.
Tipo: Article
Palavras-chave: Polyacrylamide; Polyacrylamide; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/642/1/867.pdf

Preventing irrigation furrow erosion with small applications of polymers
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Shainberg, I.; Sojka, R.E.; Carter, D.L.
Tipo: Article
Palavras-chave: Erosion; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1992
URL: http://eprints.nwisrl.ars.usda.gov/591/1/790.pdf

An automated vacuum extraction control system for soil water percolation samplers
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Kincaid, D.C.
Tipo: Article
Palavras-chave: Percolation sampler; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 2003
URL: http://eprints.nwisrl.ars.usda.gov/147/1/1089.pdf

Reducing phosphorus losses from surface-irrigated fields: emerging polyacrylamide technology
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Robbins, C.W.
Tipo: Article
Palavras-chave: Nutrients; Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/694/1/962.pdf

Percolation phosphorus losses in calcareous furrow-irrigated soils
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Westermann, D.T.
Tipo: Conference or Workshop Item
Palavras-chave: Nutrients; Nutrient losses; Calcareous soil; Phosphorous; Mass Import - autoclassified (may be erroneous).
Ano: 2001
URL: http://eprints.nwisrl.ars.usda.gov/926/1/1038.pdf

Designer, acidic biochar influences calcareous soil characteristics
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Ducey, Tom; Cantrell, K.B.; Novak, J.M.; Lentz, R.D.
An acidic (pH 5.8) biochar was created using a low pyrolysis temperature (350 degrees celsius) and steam activation to potentially improve the soil physicochemical status of an eroded calcareous soil.  Biochar was added at 0, 1, 2, and 10 percent (by weight) to an eroded Portneuf soil (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) and destructively sampled at 1, 2, 3, 4, 5, and 6 month intervals.  Soil was analyzed for volumetric water content, pH, nitrate-nitrogen, ammonium-nitrogen, plant-available iron, zinc, manganese, copper, and phosphorus, organic carbon, carbon dioxide respiration, and microbial enumeration via extractable DNA and 16S rRNA gene copies.  Soil water content increased with biochar application regardless of rate;...
Tipo: Article
Palavras-chave: Calcareous soil; Chemistry; Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1598/1/1556.pdf

Polyacrylamide as a tool for controlling sediment runoff and improving infiltration under furrow irrigation
Provedor de dados: NWISRL Publications
Autores: Ross, C.W.; Sojka, R.E.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Sediment; Infiltration management; Runoff; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/921/1/927.pdf

Measuring Wind and Low-Relief Topographic Effects on Rainfall Distribution
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Dowdy, R.H.; Rust, R.H.
Tipo: Article
Palavras-chave: Mass Import - unclassified.
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/641/1/866.pdf

Applying polymers to irrigation water: evaluating strategies for furrow erosion control
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Article
Palavras-chave: Erosion; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 2000
URL: http://eprints.nwisrl.ars.usda.gov/116/1/1028.pdf

Polymer charge and molecular weight effects on treated irrigation furrow processes
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Ross, C.W.
Tipo: Article
Palavras-chave: Mass Import - unclassified.
Ano: 2000
URL: http://eprints.nwisrl.ars.usda.gov/111/1/1023.pdf

Acrylamide monomer leaching from polyacrylamide-treated irrigation furrows
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Andrawes, F.F.; Barvenik, F.W.; Koehn, A.C.
Tipo: Article
Palavras-chave: Polyacrylamide.
Ano: 2008
URL: http://eprints.nwisrl.ars.usda.gov/1303/1/1280.pdf

PAM Spray effects on sugarbeet emergence
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Kincaid, D.C.; Lentz, R.D.
Tipo: Technical Bulletin
Palavras-chave: Sugarbeet; Seedling emergence; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1191/1/911.pdf

Compost and manure effects on sugarbeet nitrogen uptake, nitrogen recovery, and nitrogen use efficiency
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Brown, B.; Lentz, R.D.; Johnson-Maynard, J.L.; Leytem, A.B.
To maximize recoverable sucrose from sugarbeet (Beta vulgaris L.), producers must effectively manage added nitrogen (N), whether it be from urea or organic sources such as manure or composted manure.  Our multi-site study’s objective was to determine the effects of a one-time application of stockpiled and composted dairy cattle manure on sugarbeet N uptake, N recovery (NR) and N use efficiency (NUE).  First-year treatments at Site 1 included a control (no N), urea (202 kg N/ha), compost (218 and 435 kg estimated available N/ha), and manure (140 and 280 kg available N/ha).  Site 2 treatments were a control, urea (82 kg N/ha), compost (81 and 183 kg available N/ha), and manure (173 and 340 kg available N/ha).  Compost and manure were incorporated into two...
Tipo: Article
Palavras-chave: Sugarbeet; Application guidelines; Manure.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1600/1/1558.pdf

Erosion: Irrigation-induced
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Lentz, R.D.; Bjorneberg, D.L.; Sojka, R.E.
Soil can be eroded by sprinkler or surface irrigation. Once sprinkler droplet kinetic energy detaches soil, overland flow transports the sediment downslope and off-site. Protecting the soil surface, increasing sprinkler wetted diameters, and tilling to increase infiltration and thereby lessen overland flow are effective control measures. Runoff minimization and management are key to reducing erosion induced by either sprinkler or surface irrigation. Slowing furrow stream velocities with mulch or crop residues reduces the flow’s hydraulic shear and, in turn, detachment of soil from furrow wetted perimeters. Stabilizing surface soil with, for example, polyacrylamide, bio-polymers, or whey keeps soil in place and helps maintains acceptable water quality in...
Tipo: Article
Palavras-chave: Sprinkler irrigation; Erosion; Water management.
Ano: 2014

Irrigation (agriculture)
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Book Section
Palavras-chave: Mass Import - unclassified.
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/793/1/892.pdf

Manure and fertilizer effects on carbon balance and organic and inorganic carbon losses for an irrigated corn field
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
Little is known about inorganic fertilizer or manure effects on organic carbon (OC) and inorganic C (IC) losses from a furrow irrigated field, particularly in the context of other system C gains or losses. In 2003 and 2004, we measured dissolved organic and inorganic C (DOC, DIC), particulate OC and IC (POC, PIC) concentrations in irrigation inflow, runoff, and percolation waters (6-7 irrigations/y); C inputs from soil amendments and crop biomass; harvested C; and gaseous C emissions from field plots cropped to silage corn (Zea mays L.) in southern Idaho. Annual treatments included: (M) 13 (y 1) and 34 Mg/ha (y 2) stockpiled dairy manure; (F) 78 (yr 1) and 195 kg N/ha (y 2) inorganic N fertilizer; or (NA) no amendment--control. The mean annual total C...
Tipo: Article
Palavras-chave: Dissolved Orgainc Carbon (DOC); Manure; Fertilizer.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1544/1/1501.pdf

Hardwood biochar and manure co-application to a calcareous soil
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Stromberger, M.E.; Lentz, R.D.; Dungan, R.S.
Biochar may improve nutrient retention when applied to soils, so co-applying biochar with manure may be synergistically beneficial to soils.  In a laboratory incubation study, dairy manure (2% by weight) and a hardwood-based, fast pyrolysis biochar was applied (0, 1, 2, and 10% by weight) to a calcareous soil.  Destructive sampling occurred at 1, 2, 3, 4, 5, 6 and 12 months, and monitored for changes in soil chemistry, water content, microbial respiration, bacterial populations, and microbial community structure.  Increasing biochar application rate improved the soil water content, which may be beneficial in limited irrigation or rainfall areas.  Biochar application increased soil organic carbon content and plant-available iron and manganese, while a...
Tipo: Article
Palavras-chave: Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1596/1/1554.pdf

The effects of biochar and manure in silage corn
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Ippolito, J.A.; Spokas, K.A.
Amending soil with biochar may be a means of sequestering atmospheric CO2 and improving soil quality, but few multiyear field studies have examined the impacts of a one-time biochar application in an irrigated, calcareous soil. We fall-applied four treatments: dairy manure (18.7 tons/ac dry wt.); hardwood-derived biochar (10 tons/ac dry wt.); combined biochar and manure; and no amendments (control). We measured net N-mineralization using buried soil bags and soil greenhouse gas emissions (CO2, CH4, and N2O) from late spring to fall, corn silage yields, and crop N uptake each year. The influence of biochar and manure on silage yield changed with time after application in fall 2008. Biochar increased corn yields slightly (5%) in 2009, decreased yields by 14%...
Tipo: Article
Palavras-chave: Agricultural Soils; Manure Management; Calcareous soil; Soil quality; Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1584/1/1540.pdf

Polyacrylamide effects on infiltration in irrigated agriculture
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Ross, C.W.; Trout, T.J.; Bjorneberg, D.L.; Aase, J.K.
Tipo: Article
Palavras-chave: Polyacrylamide; Infiltration management; Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/705/1/974.pdf

Estimating polyacrylamide concentration in irrigation water
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Foerster, J.A.
Tipo: Article
Palavras-chave: Water-soluble PAM (WSPAM); Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/666/1/917.pdf

Biochar Usage:  Pros and Cons
Provedor de dados: NWISRL Publications
Autores: Ippolito, J.A.; Lentz, R.D.; Novak M, J; Spokas, K.A.; Collins, H.P.; Streubel, J.
Soil fertility benefits of charcoal application have been reported as early as 1847 indicating that plant nutrients are sorbed within charcoal pores.  The use of biomass-derived black carbon or biochar, the solid byproduct from the pyrolysis processing of any organic feedstock, has garnered recent attention as a potential vehicle for carbon sequestration and a beneficial soil conditioner.  However, most of the past biochar research has focused on improving the physico-chemical properties of tropical (i.e. terra preta) and highly weathered soils, while little research has focused on improving arid or semi-arid soils of the USA.  Here, we present an overview of the potential benefits and drawbacks of biochar usage in western US agro-ecosystems based on...
Tipo: Article
Palavras-chave: Soil quality; Nutrients.
Ano: 2011
URL: http://eprints.nwisrl.ars.usda.gov/1522/1/1484.pdf

Furrow irrigation water-quality effects on soil loss and infiltration
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Carter, D.L.
Tipo: Article
Palavras-chave: Infiltration; Runoff losses; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/652/1/891.pdf

Monitoring software for pollutant components in furrow irrigation runoff
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Please contact the NWISRL if you have a copy of this publication.
Tipo: Technical Bulletin
Palavras-chave: Runoff losses; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1995

Reducing soil and nutrient losses from furrow irrigated fields with polymer applications
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.; Robbins, C.W.
Tipo: Book Section
Palavras-chave: Nutrients; Chemistry; Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/808/1/969.pdf

Polyacrylamide (PAM) - A one million acre progress report
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Bjorneberg, D.L.; Aase, J.K.; Entry, J.; Morishita, D.; Ross, C.W.; Trout, T.
Tipo: Conference or Workshop Item
Palavras-chave: Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 1999
URL: http://eprints.nwisrl.ars.usda.gov/1092/1/995.pdf

Precipitation (meteorology)
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Book Section
Palavras-chave: Mass Import - unclassified.
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/794/1/893.pdf

Spray patterns from fan-type nozzles for applying PAM to soil surfaces
Provedor de dados: NWISRL Publications
Autores: Kincaid, D.C.; Lentz, R.D.; Lehrsch, G.A.
Tipo: Conference or Workshop Item
Palavras-chave: Sprinkler irrigation; Water-soluble PAM (WSPAM); Soil; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/873/1/900.pdf

Inhibiting water infiltration with polyacrylamide and surfactants: Applications for irrigated agriculture
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Tipo: Article
Palavras-chave: Polyacrylamide; Application Strategies; Infiltration management; Mass Import - autoclassified (may be erroneous).
Ano: 2003
URL: http://eprints.nwisrl.ars.usda.gov/173/1/1117.pdf

Decreasing sedimentation loss from surface irrigation into Riparian areas
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Sediment; Mass Import - autoclassified (may be erroneous).
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/1073/1/874.pdf

Unique aspects of modeling irrigation-induced soil erosion
Provedor de dados: NWISRL Publications
Autores: Bjorneberg, D.L.; Kincaid, D.C.; Lentz, R.D.; Sojka, R.E.; Trout, T.J.
Tipo: Article
Palavras-chave: Erosion; Erosion; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 2000
URL: http://eprints.nwisrl.ars.usda.gov/103/1/1015.pdf

PAM conformation effects on furrow erosion mitigation efficacy
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Sojka, R.E.
Tipo: Technical Bulletin
Palavras-chave: Polyacrylamide; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1195/1/915.pdf

Polymer and sprinkler droplet energy effects on sugar beet emergence, soil penetration resistance, and aggregate stability
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Lentz, R.D.; Kincaid, D.C.
Tipo: Article
Palavras-chave: Sugarbeet; Sprinkler irrigation; Soil; Mass Import - autoclassified (may be erroneous).
Ano: 2005
URL: http://eprints.nwisrl.ars.usda.gov/13/1/1158.pdf

Improving water quality of return flows in furrow-irrigated systems using polymer-amended inflows
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Erosion; Water quality; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/1064/1/826.pdf

Water and erosion management with multiple applications of polyacrylamide in furrow irrigation
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Westermann, D.T.
Tipo: Article
Palavras-chave: Polyacrylamide; Application Strategies; Erosion control; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/704/1/973.pdf

Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Brown, B.; Lentz, R.D.; Johnson-Maynard, J.L.; Leytem, A.B.
Adequate characterization of nitrogen (N) mineralization with time from manure and other organic sources is needed to maximize manure N use efficiency, decrease producer costs, and protect groundwater quality.  The objective of our two-year field study at Parma, ID, was to quantify in situ N mineralization with time as affected by a one-time fall application of solid dairy manure, either composted or stockpiled.  The experiment included five treatments: a non-N fertilized control, two first-year rates of stockpiled solid dairy manure (21.9 and 43.8 Mg/ha, dry wt.) and two rates (53.1 and 106.1 Mg/ha, dry wt.) of composted dairy manure (hereafter termed compost).  Net N mineralization (mineralization less immobilization) was determined to a depth of 0.3 m...
Tipo: Article
Palavras-chave: Chemistry; Composted manure; Manure.
Ano: 2016
URL: http://eprints.nwisrl.ars.usda.gov/1623/1/1580.pdf

Sediment pond effectiveness for removing phosphorus from PAM-treated irrigation furrows
Provedor de dados: NWISRL Publications
Autores: Bjorneberg, D.L.; Lentz, R.D.
Tipo: Article
Palavras-chave: Sediment; Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 2005
URL: http://eprints.nwisrl.ars.usda.gov/20/1/1168.pdf

Net and Tension infiltration effects of PAM in furrow irrigation
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.; Ross, C.W.; Trout, T.J.
Tipo: Technical Bulletin
Palavras-chave: Polyacrylamide; Infiltration management; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1193/1/913.pdf

Deep percolation and preferential flow under conventionally and PAM-treated irrigation furrows
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Westermann, D.T.; Kincaid, D.C.; Koehn, A.C.
Tipo: Conference or Workshop Item
Palavras-chave: Percolation water; Polyacrylamide; Percolation water; Mass Import - autoclassified (may be erroneous).
Ano: 2001
URL: http://eprints.nwisrl.ars.usda.gov/890/1/1037.pdf

Soil health, crop productivity, microbial transport, and mine spoil response to biochars
Provedor de dados: NWISRL Publications
Autores: Novak, J.M.; Ippolito, J.A.; Lentz, R.D.; Spokas, K.A.; Bolster, C.H.; Sistani, K.R.; Trippe, K.M.; Phillips, C.L.; Johnson, M.G.
Biochar is being evaluated by scientists from the United States Department of Agriculture (USDA) Agricultural Research Service (ARS) for its potential to sequester soil C, to improve soil health, and to increase crop yields.  ARS scientists from multiple locations such as Florence, SC, Kimberly, ID, Bowling Green, KY, Corvallis, OR, and St. Paul, MN, are conducting investigations with agronomic experiments at the laboratory, greenhouse, and field plot scales. To further expand biochars utility, ARS scientists have collaborated with United States Environmental Protection Agency (US EPA) investigators to reclaim mine-impacted soils. In the agronomic investigations, both positive and negative aspects of biochar application were revealed.  In some experiments,...
Tipo: Article
Palavras-chave: Fertility; Soil quality; Soil.
Ano: 2016
URL: http://eprints.nwisrl.ars.usda.gov/1621/1/1578.pdf

Managing Runoff Water Quality From Recently Manured, Furrow Irrigated Fields
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Westermann, D.T.
Nutrient losses in furrow irrigation runoff potentially increase when soils are amended with manure. We evaluated the effect of tillage, water soluble polyacrylamide (WSPAM) and irrigation management on runoff water quality during the first furrow irrigation on a calcareous silt loam soil, which had received 45 Mg/ha (dry wt.) dairy manure applied in the fall. In Exp. 1 the amended soil was rototilled and irrigated that fall; furrow inflows were either treated with 10 mg/L WSPAM injected into furrow inflows only during furrow advance (Fall-WSPAM), or were untreated (Fall-Control). In Exp. 2 the first irrigation on the amended soil was delayed until the following spring and treatments included rototilled WSPAM (Spring-WSPAM) and untreated rototilled...
Tipo: Article
Palavras-chave: Water management; Water quality; Furrow irrigation.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1384/1/1359.pdf

Delayed sample filtration and storage effects on dissolved nutrients measured in agricultural runoff
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.
Standard water quality analysis methods recommend that sediment-laden runoff waters sampled to determine dissolved nutrient concentrations be filtered immediately after collection.  Few research studies have examined the influence of delayed filtration on sample stability or nutrient loss assessments.  Twenty eight runoff water volumes were collected from 3 irrigation furrows during a 12-h irrigation set.  Four subsamples of each volume were obtained; 2 were filtered (45 µm) in the field and the other 2 were filtered 10 days later, with or without boric acid treatment (1 mL saturated H3BO3 solution per 100 mL sample). All samples were refrigerated at 4 deg. C.  Dissolved reactive P (DRP), NO3-N, and NH4-N concentrations were measured in all filtered...
Tipo: Article
Palavras-chave: Nitrogen; Phosphorous; Nutrients.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1516/1/1480.pdf

Time for yet another look at soil conditioners
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Article
Palavras-chave: Soil; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/632/1/854.pdf

Polyacrylamide in agriculture and environmental land management
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Bjorneberg, D.L.; Entry, J.A.; Lentz, R.D.; Orts, W.J.
Tipo: Article
Palavras-chave: Water-soluble PAM (WSPAM); Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/43/1/1196.pdf

Sediment and polyacrylamide effects on seepage from channeled flows
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Freeborn, L.L.
Seepage from water streams into unlined channels determines the  proportion of water distributed to adjacent soil for plant use or soil or  groundwater recharge or conveyed to downstream reaches. We conducted  a laboratory study to determine how sediment type (none, clay,  and silt), sediment concentration (0, 0.5, and 2 g Lj1  ), and water-soluble  anionic polyacrylamide (PAM) concentration (0, 0.4, and 2 mg Lj1  )  inf luences seepage loss of irrigation water (electrical conductivity =  0.04 S mj1  ; sodium adsorption ratio = 2.2) from unlined channels in silt  loam soil. In a minif lume, a preformed channel with 7% slope was  supplied with 40 mL minj1 simulated irrigation water inf lows containing  the different treatment combinations. Runoff and...
Tipo: Article
Palavras-chave: Sediment; Seepage reduction; Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/68/5/1233.pdf

Biochar and Manure Affect Calcareous Soil and Corn Silage Nutrient Concentrations and Uptake.
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Ippolito, J.A.
When added to soils, carbon-rich biochar derived from the pyrolysis of woody materials can sequester atmospheric carbon dioxide, mitigate climate change, and potentially increase crop productivity.  However, research is needed to confirm the suitability and sustainability of biochar application to different soils.  We applied four treatments (dry wt.) to an irrigated calcareous soil in Nov. 2008: control; stockpiled dairy manure, 18.8 Mg/ha; hardwood-derived biochar, 22.4 Mg/ha; and manure + biochar using previous rates.  Nitrogen fertilizer was applied when needed (based on pre-season soil test N and crop requirements) in all plots and years with N mineralized from added manure included in this determination.  Available soil nutrients (NH4-N, NO3-N, Olsen...
Tipo: Article
Palavras-chave: Corn / maize; Manure; Calcareous soil; Soil.
Ano: 2012
URL: http://eprints.nwisrl.ars.usda.gov/1459/1/1424.pdf

Net Infiltration and Soil Erosion Effects of a Few PPM Polyacrylamide in Furrow Irrigation Water
Provedor de dados: NWISRL Publications
Autores: Sojka, R.E.; Lentz, R.D.
Tipo: Conference or Workshop Item
Palavras-chave: Polyacrylamide; Polyacrylamide; Erosion control; Infiltration management; Erosion; Mass Import - autoclassified (may be erroneous).
Ano: 1995
URL: http://eprints.nwisrl.ars.usda.gov/1072/1/873.pdf

Fate of acrylamide monomer following application of polyacrylamide to cropland
Provedor de dados: NWISRL Publications
Autores: Barvenik, F.W.; Sojka, R.E.; Lentz, R.D.; Andrawes, F.F.; Messner, L.S.
Tipo: Technical Bulletin
Palavras-chave: Application Strategies; Mass Import - autoclassified (may be erroneous).
Ano: 1996
URL: http://eprints.nwisrl.ars.usda.gov/1192/1/912.pdf

Sugarbeet yield and quality when substituting compost or manure for conventional nitrogen fertilizer
Provedor de dados: NWISRL Publications
Autores: Lehrsch, G.A.; Brown, B.; Lentz, R.D.; Johnson-Maynard, J.L.; Leytem, A.B.
To profitably produce sugarbeet (Beta vulgaris L.) by maximizing recoverable sucrose, producers must effectively manage added nitrogen (N), whether it be from inorganic sources such as urea or from often readily available and sometimes less expensive organic sources such as manure or composted manure. Our multi-site study’s objective was to determine if equivalent sugarbeet root and sucrose yields could be achieved when substituting composted dairy cattle manure or stockpiled manure for conventional N (urea) fertilizer. Treatments at Site 1 (Parma, ID), for 2 y included a control (no N applied), urea (202 kg N/ha), compost (1089 and 2175 kg total N/ha), and manure (350 and 701 kg total N/ha). Treatments at Site 2 (Kimberly, ID), were a control, urea (82 kg...
Tipo: Article
Palavras-chave: Sugarbeet; Manure; Chemistry; Nitrogen; Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1560/1/1516.pdf

Reducing nutrient losses in runoff from furrow irrigation
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Westermann, D.T.; Lehrsch, G.A.
Few studies have comprehensively examined nutrient losses in runoff from furrow-irrigated fields, but the rising cost of fertilizer and finite nature of the resource encourages further research.  A 2-yr experiment measured runoff losses of sediment, particulate P and N, and dissolved NO3-N, NH4-N, K, and reactive P (DRP) from fertilized, manured, or non-amended fields.  Average nutrient losses were substantial, including 15.6 lbs ac/yr dissolved N, P, and K and 73.6 lbs ac/yr particulate N and P. The cost or replacing these nutrients with inorganic fertilizers was not trivial, at $54.69 ac/yr.  Relative to non-amended soil, manure increased dissolved K, NO3-N, and DRP in runoff by 2.1x, 1.5x, and 2.7x, respectively. Other experiments evaluated the...
Tipo: Conference or Workshop Item
Palavras-chave: Furrow irrigation; Runoff losses; Nutrients; Sediment.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1518/1/1482.pdf

Influence of irrigation water properties on furrow infiltration: Temperature effects
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Bjorneberg, D.L.
Tipo: Conference or Workshop Item
Palavras-chave: Infiltration; Mass Import - autoclassified (may be erroneous).
Ano: 2002
URL: http://eprints.nwisrl.ars.usda.gov/892/1/1066.pdf

Manure and fertilizer effects on carbon balance and losses for irrigated corn
Provedor de dados: NWISRL Publications
Autores: Lentz, R.D.; Lehrsch, G.A.
Little is known about inorganic fertilizer or manure effects on organic carbon (OC) and inorganic C (IC) losses from a furrow irrigated field, particularly in the context of other system C gains or losses.  In 2003 and 2004, we measured dissolved organic and inorganic C (DOC, DIC), particulate OC and IC (POC, PIC) concentrations in irrigation inflow, runoff, and percolation waters (6-7 irrigations/y); C inputs from soil amendments and crop biomass; harvested C; and gaseous C emissions from field plots cropped to silage corn (Zea mays L.) in southern Idaho.  Annual treatments included:  (M) 13 (y 1) and 34 Mg/ha (y 2) stockpiled dairy manure; (F) 78 (yr 1) and 195 kg N/ha (y 2) inorganic N fertilizer; or (NA) no amendment--control.  The mean annual total C...
Tipo: Article
Palavras-chave: Corn / maize; Dissolved Organic Carbon (DOC); Manure.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1546/1/1504.pdf