|
|
|
| Registros recuperados: 601 | |
|
|
| Leytem, A.B.; Maguire, R.O.. |
| Animal production in the USA is valued at more than $100 billion and has consolidated significantly during the last 20 years, with a larger number of animals being produced on an increasingly smaller land base (Kellogg et al., 2000). Manure generated from animal production is currently estimated to exceed 335 million t of dry matter per year in the USA, while global manure production is estimated at —13 billion t of dry matter per year (Mullins et al., 2005). Manures contain significant amounts of phosphorus, with values between 6.7 and 29.1 g P/kg on a dry weight basis reported for several species of animals (Barnett, 1994). This phosphorus includes inorganic and organic forms, with the latter constituting between 10°/a and 80% of the... |
| Tipo: Book Section |
Palavras-chave: Chemistry; Mass Import - autoclassified (may be erroneous). |
| Ano: 2007 |
URL: http://eprints.nwisrl.ars.usda.gov/832/1/1222.pdf |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| Massey, M.S.; Davis, J; Ippolito, J.A.; Sheffield, R.E.. |
| Magnesium phosphates such as struvite (MgNH4PO4x6H2O) can be recovered from municipal, industrial and agricultural wastewaters. However, minimal research has been conducted on the beneficial reuse of these recovered products; conducted research has focused on low pH soils. This study determined whether recovered struvite and dittmarite (MgNH4PO4xH2O) were effective P fertilizers in alkaline soils. In addition to commercially available triple superphosphate (TSP) and certified organic rock phosphate (RP), recovered struvite, dittmarite, and a heterogeneous recovered phosphate were evaluated in a laboratory dissolution study and as fertilizers for spring wheat (Triticum aestivum L.) in a greenhouse study. Struvite and dittmarite were much more soluble... |
| Tipo: Article |
Palavras-chave: Chemistry; Fertility; Soil quality; Water. |
| Ano: 2009 |
URL: http://eprints.nwisrl.ars.usda.gov/1576/1/1532.pdf |
| |
|
| |
|
|
| Leytem, A.B.; Kwanyuen, P.; Plumstead, P.W.; Maguire, R.O.; Brake, J.. |
| Using 31-phosphorus nuclear magnetic resonance spectroscopy ((31)P-NMR) to characterize phosphorus (P) in animal manures and litter has become a popular technique in the area of nutrient management. To date, there has been no published work evaluating P quantification in manure/litter samples with (31)P-NMR compared to other accepted methods such as high performance liquid chromatography (HPLC). To evaluate the use of (31)P-NMR to quantify myo-inositol hexakisphosphate (phytate) in ileal digesta, manure, and litter from broilers, we compared results obtained from both (31)P-NMR and a more traditional HPLC method. The quantification of phytate in all samples was very consistent between the two methods, with linear regressions having slopes ranging from 0.94... |
| Tipo: Article |
Palavras-chave: Chemistry. |
| Ano: 2008 |
URL: http://eprints.nwisrl.ars.usda.gov/1268/1/1246.pdf |
| |
|
| |
|
| |
|
|
| Leytem, A.B.; Dungan, R.S.. |
| The expansion of the dairy industry in southern Idaho has lead to increased application of manures to meet crop nutrient demands which can alter the uptake pattern of both macro- and micro-nutrients. A greenhouse study was conducted to determine the effects of dairy manure, composted dairy manure, and fertilizer (mono-ammonium phosphate, MAP) application on soil test phosphorus (P), microbial activity, and nutrient uptake by silage corn. Two Portneuf soils, having either a low or high soil test P concentration, were amended with the three treatments at four application rates (25, 50, 100, and 200 mg P kg-1) with four replications of each treatment in a randomized complete design. Treatments were incubated for two weeks, then planted with corn grown for... |
| Tipo: Article |
Palavras-chave: Chemistry; Composted manure; Manure. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1438/1/1405.pdf |
| |
|
| |
| Registros recuperados: 601 | |
|
|
|
