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| Registros recuperados: 10 | |
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| Ippolito, J.A.; Barbarick, K.A.; McDaniel, J.P.; Hansen., N.C.; Peterson, G.A.. |
| Dryland agroecosystems are generally ideal environments for recycling biosolids. However, what is the efficacy of biosolids addition to a no-till dryland management agroecosystem? From 2000 to 2010, we studied application of biosolids from the Littleton/Englewood, CO Wastewater Treatment Plant versus commercial nitrogen fertilizer in dryland no-till wheat (Triticum aestivum, L.)-fallow (WF) and wheat-corn (Zea mays, L.)-fallow (WCF) rotations at a site approximately 50 miles east of Denver, CO. We tested if biosolids would produce the same yields and grain phosphorus, zinc, and barium concentrations as an equivalent rate of nitrogen fertilizer, that biosolids-borne phosphorus, zinc, and barium would not migrate below the 4 inch soil depth, and that... |
| Tipo: Article |
Palavras-chave: Small grain; Dryland crops; Nitrogen; Phosphorous. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1446/1/1411.pdf |
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| 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 |
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| Barbarick, K.A.; Ippolito, J.A.; McDaniel, J.P.. |
| Understanding N dynamics in biosolids-amended agroecosystems can help avoid over-application and the potential for environmental degradation. We investigated 15-years of biosolids application to dryland-wheat, questioning what is the relationship between cumulative grain yield and N uptake (N removal) and biosolids or N fertilizer rates and how many times biosolids or N fertilizer are applied? How are wheat-grain production and N uptake intertwined with residual soil nitrate-N? We found that biosolids or N fertilizer rates plus the number of applications of each material produced planar-regression (3-dimensional) models with 15-years of grain yield and N uptake data (all R2 > 0.93). To evaluate how yield or N uptake impacted residual soil nitrate-N, we... |
| Tipo: Article |
Palavras-chave: Dryland crops; Small grain; Nitrogen; Soil quality. |
| Ano: 2010 |
URL: http://eprints.nwisrl.ars.usda.gov/1404/1/1374.pdf |
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| Tarkalson, D.D.; Brown, B.; Kok, H.; Bjorneberg, D.L.. |
| The effects of straw removal from irrigated wheat and barley fields cropped to wheat and barley on soil properties and nutrient cycling is a concern due to its potential impact on the sustainability of agricultural production. Increasing demand of straw for animal bedding and the potential development of cellulosic ethanol production will likely increase the demand in the future. Previous reviews addressing changes in soil properties when crop residues are removed focused primarily on rain-fed systems. This paper reviews published research assessing the effects of wheat and barley straw removal on soil organic carbon (SOC), and analyzes changes in nutrient cycling within irrigated wheat and barley production systems. The effects of straw removal on bulk... |
| Tipo: Article |
Palavras-chave: Dryland crops; Small grain; Soil. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1569/1/1525.pdf |
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| Barbarack, K.A.; Ippolito, J.A.; McDaniel, J.P.; Hansen., N.C.; Peterson, G.A.. |
| In the western Great Plains, climate dictates dryland wheat (Triticum aestivum, L) productivity. Producers use inorganic N fertilizers to improve crop yields in this region, while municipalities recycle sewage biosolids in the area. Will biosolids (from the Littleton/Englewood, CO Wastewater Treatment Plant) applications to western Great Plains dryland agroecosystems interact with weather to affect wheat production? To this end, we regressed crop yields on weather variables from 2000 through 2011 at a site about 40 km (approximately 25 miles) east of Byers, CO (Byers). We used SAS (Proc Reg) to develop several multiple regression models to predict crop yields. Our model of choice included four weather parameters for Byers wheat production. Regression... |
| Tipo: Technical Bulletin |
Palavras-chave: Dryland crops; Fertilizer; Nitrogen. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1515/1/1479.pdf |
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| Bjorneberg, D.L.. |
| Irrigation applies water to soil to improve crop production. The three main methods of irrigation are surface, sprinkler and micro. Surface irrigation is used on 85% of the irrigated land in the world. It generally requires lower capital investment because the soil conveys water within the field, rather than pipes or tubing used for sprinkler or microirrigation. Water application is more controlled with sprinkler and microirrigation and these irrigation methods can be automated easier than surface irrigation. There are many variations of irrigation methods and types of irrigation equipment. The purpose of this article is to describe the irrigation methods primarily used for agricultural production. |
| Tipo: Article |
Palavras-chave: Dryland crops; Irrigation control; Sprinkler irrigation; Soil; Water. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1568/1/1524.pdf |
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| Panella, Leonard W.; Kaffka, S.K; Lewellen, R.T.; McGrath, J.M; Metzer, M.S.; Strausbaugh, C.A.. |
| Sugar beet is an industrial crop, in that it is neither the seed nor the foliage that is the plant constituent of interest – not even the root itself, but rather sucrose refined from the root. For this reason yield is a complex trait, when looking at the amount of refined white sugar produced per area. Yield is calculated by the root weight times the percentage of that weight that is sucrose (usually expressed as percent of fresh weight), but also by the amount of the sucrose that can be extracted from the beet juice during processing (often expressed as juice purity or percent loss to molasses). All three of these components are variable in a population and can be improved through plant breeding. Percent sucrose is positively correlated to the amount... |
| Tipo: Book Section |
Palavras-chave: Dryland crops; Sugarbeet. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1562/1/1518.pdf |
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| Barbarack, K.A.; Ippolito, J.A.; McDaniel, J.. |
| Biosolids regulations developed in the United States employed risk assessment impacts of trace element additions on plant uptake. The US Environmental Protection Agency adapted the uptake coefficient (ratio of plant concentration to quantity of element added) when developing limitations on selected elemental additions. The nature of the risk assessment requires uptake coefficients to be constants. Our hypothesis was the uptake coefficient for copper, iron, molybdenum, nickel, phosphorus, and zinc for biosolids-amended dryland winter wheat decreases with multiple biosolids applications at the same location. We applied up to 10 applications to two sites (designated North Bennett A and B) in eastern Colorado at rates from 2.24 to 11.2 megagrams per... |
| Tipo: Article |
Palavras-chave: Dryland crops; Research methodology; Soil. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1580/1/1536.pdf |
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| Registros recuperados: 10 | |
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