|
|
|
| Registros recuperados: 45 | |
|
|
| Tarkalson, D.D.; Ippolito, J.A.. |
| Development of best management practices can help improve inorganic nitrogen (N) availability to plants and reduce nitrate-nitrogen (NO3-N) leaching in soils. This study was conducted to determined the influence of the zeolite mineral Clinoptilolite (CL) additions on NO3-N and ammonium-nitrogen (NH4-N) in the soil/leachate system of two common Pacific Northwest soils (Portneuf silt loam and Wolverine sand). |
| Tipo: Article |
Palavras-chave: Soil; Chemistry. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1336/1/1313.pdf |
| |
|
|
| Tarkalson, D.D.; Ippolito, J.A.. |
| Development of best management practices can help improve inorganic nitrogen (N) availability to plants and reduce nitrate-nitrogen (NO3-N) leaching in soils. This study was conducted to determine the influence of the zeolite mineral Clinoptilolite (CL) additions on NO3-N and ammonium-nitrogen (NH4-N) in two common Pacific Northwest soils. The effects of CL application rate (up to 26.9 Mg ha-1) either band applied or mixed with a set rate of nitrogen (N) fertilizer on masses of NO3-N and NH4-N in leachate and soil was investigated in a column study using a Portneuf silt loam (coarse-silty mixed mesic Durixerollic Caliciorthid) and a Wolverine sand (Mixed, frigid Xeric Torripsamment). All treatments for each soil received a uniform application of N from... |
| Tipo: Article |
Palavras-chave: Practical farm efficiency; Nitrogen; Soil. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1431/1/1401.pdf |
| |
|
|
| Tarkalson, D.D.; Ippolito, J.A.. |
| Development of best management practices can help improve inorganic nitrogen (N) availability to plants and reduce nitrate-nitrogen (NO3-N) leaching in soils. This study was conducted to determine the influence of the zeolite mineral clinoptilolite (CL) additions on NO3-N and ammonium-nitrogen (NH4-N) in two common Pacific Northwest soils. The effects of CL application rate (up to 26.9 Mg ha-1) either band applied or mixed with a set rate of N fertilizer on masses of NO3-N and NH4-N in leachate and soil were investigated in a column study using a Portneuf silt loam (coarse-silty mixed mesic Durixerollic Caliciorthid) and a Wolverine sand (Mixed, frigid Xeric Torripsamment). All treatments for each soil received a uniform application of N from urea... |
| Tipo: Article |
Palavras-chave: Amendments; Nitrogen; Soil. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1436/1/1403..pdf |
| |
|
| |
|
|
| Ippolito, J.A.; Ducey, Tom; Tarkalson, D.D.. |
| Sequestering carbon in soils may be one method to reduce the concentration of carbon dioxide in the atmosphere. We measured inorganic and organic carbon, bacterial biomass and structural community diversity in southern Idaho soils having long term land use histories that supported native sagebrush vegetation (NSB), irrigated moldboard plowed crops (IMP), irrigated conservation (chisel) tilled crops (ICT) and irrigated pasture systems (IP). Organic carbon in soil decreased in the order IP>ICT>NSB>IMP. We use our findings to estimate the organic carbon, potentially sequestered if the use of irrigated agriculture were increased. We also use our findings to estimate inorganic and total carbon, potentially sequestered if the use of irrigated... |
| Tipo: Article |
Palavras-chave: Corn / maize; Amendments. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1406/1/1376.pdf |
| |
|
|
| Biswas, S; Shapiro, C.A.; Kranz, W.L.; Mader, T.L.; Shelton, D.P.; Snow, D.D.; Bartlett-Hunt, S.L.; Tarkalson, D.D.; vanDonk, S.J.; Zhang, T.C.; Ensley, S.M.. |
| Growth promoting steroids and steroid-like compounds (GPSC) used by the US beef cattle industry are potential contaminants to water resources. Manure generated in concentrated animal feeding operations contains GPSCs that may enter the environment. Several studies have focused on off-site impacts of GPSC in aquatic life and suggest possible adverse impacts such as abnormal blood hormone levels, masculinization of females, feminization of males, altered sex ratios, intersexuality and reduced fertility. Other studies point to potential human health impacts including increased incidence of human cancers, sexual disorders, and decline in male: female ratio in human beings. However, the use of GPSCs in beef production provides benefits to both cattle producers... |
| Tipo: Article |
Palavras-chave: Animal health; Animal. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1500/1/1463.pdf |
| |
|
|
| Tarkalson, D.D.; Kachman, S.D.; Knops, J.M.N.; Thies, J.E.; Wortmann, C.S.. |
| Results of a previous laboratory study indicated that six transgenic crops expressing the Cry1Ab insecticidal protein from Bacillus thuringiensis (Bt) decomposed at a slower rate than their respective non-Bt isolines. Consequently, litter decomposition rates, nitrogen cycling, and carbon pools may change in agricultural systems as the result of the widespread use of Bt crops. In this study, we assessed the decomposition rates and chemical composition of commonly grown hybrids of Bt and non-Bt isolines of corn (Zea mays L.) in the field. Leaves, stalks, and cobs from two Bt corn hybrids (Pioneer 34N44 Bt and NC+ 4990 Bt) and their non-Bt isolines (Pioneer 34N43 and NC+ 4880) were analyzed for biomass fractions (soluble, hemicellulose, cellulose, and lignin)... |
| Tipo: Article |
Palavras-chave: Nitrogen. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1273/1/1250.pdf |
| |
|
|
| Kyaw, T.; Ferguson, R.B.; Adamchuk, V.I.; Marx, D.B.; Tarkalson, D.D.; McCallister, D.L.. |
| Iron chlorosis can limit crop yield, especially on calcareous soil. Typical management for iron chlorosis includes the use of iron fertilizers or chlorosis tolerant cultivars. Calcareous and non-calcareous soil can be interspersed within fields. If chlorosis-prone areas within fields can be predicted accurately, site-specific use of iron fertilizers and chlorosis-tolerant cultivars might be more profitable than uniform management. In this study, the use of vegetation indices (VI) derived from aerial imagery, on-the-go measurement of soil pH and apparent soil electrical conductivity (ECa) were evaluated for their potential to delineate chlorosis management zones. The study was conducted at six sites in 2004 and 2005. There was a significant statistical... |
| Tipo: Article |
Palavras-chave: Calcareous soil; Fertilizer. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1275/1/1251.pdf |
| |
|
|
| Tarkalson, D.D.; Eujayl, Imad A.; King, B.A.. |
| Technical Abstract: Increased water demands and drought have resulted in a need to indentify crop hybrids that are drought tolerant, requiring less irrigation to sustain yields. This study was conducted to assess differences in drought tolerance among a group of genetically diverse sugarbeet hybrids. The study was conducted over three consecutive growing seasons (2008-2010) at the USDA Northwest Irrigation and Soils Research Laboratory in Kimberly, ID on a Portneuf silt loam soil (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid). Drought tolerance was evaluated by measuring sucrose yield production of six experimental hybrids of KWS SAAT AG and one commercial hybrid (Betaseed Inc.) under six water input treatments. Hybrid drought... |
| Tipo: Article |
Palavras-chave: Sugarbeet. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1553/1/1509.pdf |
| |
|
|
| Tarkalson, D.D.; Eujayl, Imad A.; Beyer, Werner; King, B.A.. |
| Increased water demands and drought have resulted in a need to indentify crop hybrids that are drought tolerant, requiring less irrigation to sustain yields. This study was conducted to assess differences in drought tolerance among a group of genetically diverse sugarbeet hybrids. The study was conducted over three consecutive growing seasons (2008-2010) at the USDA Northwest Irrigation and Soils Research Laboratory in Kimberly, Idaho on a Portneuf silt loam soil (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid). Drought tolerance was evaluated by measuring sucrose yield production of six breeding hybrids of Klein Wanzlebener Saatzucht (KWS SAAT AG) and one commercial hybrid (Betaseed Inc.) under six water input treatments. Hybrid... |
| Tipo: Article |
Palavras-chave: Dryland crops; Sugarbeet; Water management. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1578/1/1534.pdf |
| |
|
|
| Bartlelt-Hunt, S.L.; De Vivo, S; Johnson, L.C.; Snow, D.D.; Kranz, W.L.; Mader, T.L.; Shapiro, C.A.; Van Donk, S.J.; Shelton, D.P.; Zhang, T.C.; Tarkalson, D.D.. |
| In this study, the fate of steroid hormones in beef cattle manure composting is evaluated. The fate of 16 steroids and metabolites was evaluated in composted manure from beef cattle administered growth promotants and from beef cattle with no steroid hormone implants. The fate of estrogens (primary detected as estrone), androgens, progesterone, and the fusarium metabolite and implant a-zearalanol were monitored in manure compost piles. First-order decay rates were calculated for steroid half-lives in compost and ranged from 8 days for androsterone to 69 days for 4-androsterone. Other steroid concentration data did not fit first-order decay models which may indicate that other microbial processes may result in steroid production or synthesis in... |
| Tipo: Article |
Palavras-chave: Feed preference; Animal; Manure. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1563/1/1519.pdf |
| |
|
|
| BARTELT-HUNT L, SHANNON; SNOW D, DANIEL; KRANZ L, WILLIAM; MADER L, TERRY; Shapiro, C.A.; VAN DONK J, SIMON; SHELTON P, DAVID; Tarkalson, D.D.. |
| Supplements and growth promotants containing steroid hormones are routinely administered to beef cattle to improve feeding efficiency, reduce behavioral problems, and enhance production. As a result, beef cattle manure will contain both synthetic steroids as well as a range of endogenous steroids including androgens, estrogens, and progestogens. A two-year controlled study was conducted in which beef cattle were administered steroid hormones via subcutaneous implants and feed additives and the occurrence of sixteen endogenous and synthetic steroid hormones and metabolites was evaluated in runoff from beef cattle feedlots and in manure and soil collected from feedlot surfaces. Samples were extracted and analyzed using liquid chromatography tandem mass... |
| Tipo: Article |
Palavras-chave: Animal; Runoff; Manure. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1450/1/1415.pdf |
| |
|
|
| Payero, J.O.; Tarkalson, D.D.; Irmak, S.; Davison, D.; Petersen, J.L.. |
| Quantifying the local crop response to irrigation is important for establishing adequate irrigation management strategies. This study evaluated the effect of irrigation applied with subsurface drip irrigation on field corn (Zea mays L.) evapotranspiration (ETc), yield, water use efficiencies (WUE = yield/ETc, and IWUE = yield/irrigation), and dry matter production in the semiarid climate of west central Nebraska. Eight treatments were imposed with irrigation amounts ranging from 53 to 356 mm in 2005 and from 22 to 226 mm in 2006. A soil water balance approach (based on FAO-56) was used to estimate daily soil water and ETc. Treatments resulted in seasonal ETc of 580–663 mm and 466–656 mm in 2005 and 2006, respectively. Yields among treatments differed by as... |
| Tipo: Article |
Palavras-chave: Drip irrigation. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1288/1/1265.pdf |
| |
|
|
| Payero, J.O.; Tarkalson, D.D.; Irmak, S.; Davison, D.; Petersen, J.L.. |
| Water regulations have decreased irrigation water supplies in Nebraska and some other areas of the USA Great Plains. When available water is not enough to meet crop water requirements during the entire growing cycle, it becomes critical to know the proper irrigation timing that would maximize yields and profits. This study evaluated the effect of timing of a deficit-irrigation allocation (150 mm) on crop evapotranspiration (ETc), yield, water use efficiency (WUE = yield/ETc), irrigation water use efficiency (IWUE = yield/irrigation), and dry mass (DM) of corn (Zea mays L.) irrigated with subsurface drip irrigation in the semiarid climate of North Platte, NE. During 2005 and 2006, a total of sixteen irrigation treatments (eight each year) were... |
| Tipo: Article |
Palavras-chave: Soil; Water; Drip irrigation. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1328/1/1305.pdf |
| |
|
|
| Tarkalson, D.D.; King, B.A.; Bjorneberg, D.L.; Taberna, J.P, Jr.. |
| Research studies have evaluated the production of potatoes (Solanum tuberosum L.) grown in conventional and bed planting configurations. However, intercepted photosynthetically active radiation (PAR) from these planting configurations has not been quantified. A study conducted in 2008 and 2009 quantified and compared the intercepted PAR from three planting configurations (four row conventional ridged-row [4RC], five row bed [5RB], and seven row bed [7RB]), and from different plant spacings of cvs Russet Burbank, Russet Norkotah, and Ranger Russet potatoes under sprinkler irrigation. A second study was conducted in 2007 to evaluate the relationship between PAR and leaf area of Russet Norkotah and Russet Burbank for the three planting configurations. These... |
| Tipo: Article |
Palavras-chave: Potato. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1449/1/1414.pdf |
| |
|
|
| Tarkalson, D.D.; Bjorneberg, D.L.; Moore, Amber. |
| The sugarbeet (Beta vulgaris L.) industry in Idaho is interested in strip tillage (ST) primarily due to the potential savings in tillage costs. This study was conducted to evaluate the use of strip tillage in Idaho compared to conventional tillage practices and to evaluate N requirements of sugarbeet under ST and conventional tillage. The effect of tillage method (strip tillage, moldboard plow system [MP], and chisel plow system [CP]) and N supply (5 levels) on sugarbeet production factors were investigated in Kimberly, ID from 2008 to 2010 on a Portneuf silt loam with barley as the previous crop. Root and estimated recoverable sucrose (ERS) yields were the same under all three tillage practices. However, estimated tillage costs for ST were from 53... |
| Tipo: Article |
Palavras-chave: Sugarbeet; Tillage; Nitrogen. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1502/1/1465.pdf |
| |
|
|
| Tarkalson, D.D.; King, B.A.; Bjorneberg, D.L.; Taberna, J.P.. |
| Research studies have shown that planting potatoes (Solanum tuberosum L.) in a bed configuration can improve water movement into the potato root zone. However, plant spacing recommendations are needed for potatoes planted in a bed configuration. This study was conducted to evaluate the effect of in-row plant spacing and planting configuration on yield of Russet Burbank, Russet Norkotah, and Ranger Russet potatoes under sprinkler irrigation. For the three varieties, the effect of in-row plant spacing (three spacing treatments) for each planting configuration (4 row conventional ridged-row [4RC], 5 row bed [5RB], and 7 row bed [7RB]), and the effect of planting configuration on total tuber yield, U.S. No. 1 tuber yield, percent No. 1 tubers, average size... |
| Tipo: Article |
Palavras-chave: Irrigation control; Potato. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1418/1/1388.pdf |
| |
|
|
| Tarkalson, D.D.; Bjorneberg, D.L.. |
| Nutrient placement options with strip tillage (ST) can potentially improve plant nutrient utilization and increase crop yield compared to conventional fertilizer placement practices under conventional tillage (CT). The effects of tillage practice and nitrogen (N) and phosphorus (P) placement on grain yield, biomass yield (whole plant, sum of grain, cobs, and stover), and N and P uptake of field corn (Zea mays L.) were assessed on four sites during 2007 and 2009 at the USDA-ARS Northwest Irrigation & Soils Research Laboratory at Kimberly, ID. During each year, two locations (eroded and not eroded from furrow irrigation) were utilized as study locations. Band placement of fertilizer with ST increased corn grain yield by 12.5 percent (689 kg per ha) and... |
| Tipo: Article |
Palavras-chave: Fertilizer; Soil; Nitrogen; Phosphorous. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1383/1/1358.pdf |
| |
|
|
| Tarkalson, D.D.; Bjorneberg, D.L.. |
| Nutrient placement options with strip tillage (ST) can potentially improve plant nutrient utilization and increase crop yield compared to conventional fertilizer placement practices under conventional tillage (CT). The effects of tillage practice and nitrogen (N) and phosphorus (P) placement on grain yield, biomass yield (whole plant, grain + cobs + stover), and N and P uptake of field corn (Zea mays L.) were assessed on four sites during 2007 and 2009 at the USDA-ARS Northwest Irrigation & Soils Research Laboratory at Kimberly, ID. During each year, two locations (eroded and not eroded from furrow irrigation) were utilized as study locations. Band placement of fertilizer with ST increased corn grain yield by 12.5 % (11 bu/acre) and 25.9% (26 bu/acre)... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Tillage; Nitrogen; Phosphorous. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1386/1/1361.pdf |
| |
|
| |
| Registros recuperados: 45 | |
|
|
|
