|
|
|
| Registros recuperados: 36 | |
|
|
| Lehrsch, G.A.; Kincaid, D.C.. |
| Dairy manure increases the yields of dry bean (Phaseolus vulgaris L.) and spring wheat (Triticum aestivum L.) from eroded, furrow-irrigated soils and may increase corn (Zea mays L.) silage yield from steeper eroded areas under sprinkler irrigation. In a 2-year field study in southern Idaho on Portneuf silt loam (coarse silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid), the effects of a one-time, fall application of 29 or 72 Mg ha-1 of dry manure or 22 or 47 Mg ha21 of dry compost on subsequent silage yield and nitrogen (N) uptake from previously eroded, sprinkler-irrigated hill slopes were evaluated. In October 1999, stockpiled or composted dairy manure was disked to a depth of 0.15 m into plots with slopes from 0.8 to 4.4%. After... |
| Tipo: Article |
Palavras-chave: Corn / maize; Corn; Composted manure; Chemistry; Fertilizer; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/66/1/1230.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Payero, J.O.; Melvin, S.R.; Irmak, S.; Tarkalson, D.. |
| Irrigation water supplies are decreasing in many areas of the US Great Plains, which is requiring many farmers to consider deficit-irrigating corn (Zea mays L.) or growing crops like winter wheat (Triticum aestivum L.) that require less water, but that are less profitable. The objectives of this study were to: (1) quantify the yield response of corn to deficit irrigation, and (2) determine which of several seasonal water variables correlated best to corn yield in a semiarid climate. Eight (T1-T8) and nine (T1-T9) deficit-irrigated treatments (including dryland), were compared in 2003 and 2004 in North Platte, Nebraska. The actual seasonal crop evapotranspiration (ETd) (calculated with procedures in FAO-56) for the different treatments was 37-79% in... |
| Tipo: Article |
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous). |
| Ano: 2006 |
URL: http://eprints.nwisrl.ars.usda.gov/56/1/1218.pdf |
| |
|
| |
|
|
| Ippolito, J.A.; Tarkalson, D.D.; Lehrsch, G.A.. |
| Adoption of new management techniques which improve soil water storage and soil nitrogen plant availability yet limit nitrogen leaching may help improve environmental quality. A benchtop study was conducted to determine the influence of a single urea fertilizer rate (224 kilograms of Nitrogen per hectare) applied with band or fully-mixed zeolite (Clinoptilolite) application rates (up to 90 megagrams per hectare) on ammonium-nitrogen and nitrate-nitrogen concentrations in a Portneuf silt loam. Two additional greenhouse experiments were carried out to test the soil moisture status and corn growth in a Wolverine sand. Mixing urea fertilizer into silt loam soil resulted in greater urea mineralization, but the mixed zeolite was more effective at adsorbing... |
| Tipo: Article |
Palavras-chave: Corn / maize; Amendments; Nitrogen. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1416/1/1386.pdf |
| |
|
| |
|
|
| Tarkalson, D.D.; Mikkelsen, R.L.. |
| Recent efforts to reduce phosphorus (P) content of corn grain fed to poultry have led to the development of low-phytic-acid corn. Research is needed to evaluate the environmental impact of the application to cropland of manure from animals fed low-phytic-acid corn. The purpose of this research was to determine P losses in runoff from a bare Piedmont soil (cecil clay loam; clayey, kaolinitic, thermic, Typic Kanhapludult) in the southeastern United States receiving surface applications of broiler litter from birds fed a low-phytic-acid corn (HAP broiler litter). The HAP litter was applied at rates of 0, 8, 16, 33, 49, 66, and 82 kg P ha-1 . Simulated rainfall was applied at a rate of 7.6 cm hr-1 on the same day the litter sources were applied to... |
| Tipo: Article |
Palavras-chave: Corn / maize; Nutrients; Corn; Chemistry; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/64/1/1229.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 |
| |
|
| |
|
| |
|
|
| Lehrsch, G.; Sojka, R.; Westermann, D.. |
| Banding and sidedressing nitrogen (N) fertilizer on a never-irrigated side of a row of corn (Zea mays L.) were hypothesized to maintain yield and decrease nitrate leaching. In a two—year ?eld study on a Portneuf silt loam (Durinodic Xeric Haplocalcid) in southern Idaho, we evaluated effects on yield and N uptake of 1) urea placement (broadcast pre-plant vs. band at planting), 2) row spacings (30-in vs. an offset 22—in spacing in which every pair of 22-—in rows was positioned close to a furrow rather than each row on a bed center), and 3) water management. Our water management, termed irrigated furrow positioning, consisted of every- second furrow irrigation in which we applied water to either a) the same or b) the Opposite side of the row with... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Corn / maize; Water management; Mass Import - autoclassified (may be erroneous). |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1267/7/1243.pdf |
| |
|
| |
| Registros recuperados: 36 | |
|
|
|
