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| Registros recuperados: 1.593 | |
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| Leytem, A.B.; Turner, B.L.; Raboy, V.; Peterson, K.L.. |
| Land application of manure can increase P transfer in runoff, although the risk depends in part on the characteristics of the manure. We assessed this for calcareous soils using manures from swine (Sus domesticus) fed one of five barley varieties (Hordeum vulgare L.), including four low phytate mutants and a normal variety, to produce manures with a range of total P (6.8-4.9 g P water-soluble P (4.3-8.0 g P kg-'), total N/P ratios (2.5:1-5.5:1), and total C/P ratios (31:1-67:1). Two experiments were conducted. First, manures were incorporated into three soils on a N (150 mg N kg-' soil) or P (27.5 mg P kg-1 soil) basis three times during a 7-wk incubation. Second, 10 additional soils were incubated for 2 wk following a single P-based manure... |
| Tipo: Article |
Palavras-chave: Chemistry; Calcareous soil; Phosphorous; Mass Import - autoclassified (may be erroneous). |
| Ano: 2005 |
URL: http://eprints.nwisrl.ars.usda.gov/17/1/1164.pdf |
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| 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 |
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| Strausbaugh, C.A.; Panella, Leonard W.. |
| Curly top caused by Beet curly top virus (BCTV) is a widespread disease problem vectored by the beet leafhopper in semiarid sugar beet production areas. Host resistance is the primary defense against this problem, but resistance in commercial cultivars is only low to intermediate. In order to identify novel sources of curly top resistance, twenty-four plant introduction (PI) lines were screened in a disease nursery in 2014. The lines were arranged in a randomized complete block design with three replications. A curly top epiphytotic was created by releasing approximately 6 viruliferous beet leafhoppers per plant at the four- to six-leaf growth stage on 23 Jun. Foliar symptoms were evaluated on 16 Jul using a scale of 0-9 (0 = healthy and 9 = dead) in a... |
| Tipo: Article |
Palavras-chave: Curly top; Resistance; Verticillium wilt. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1588/1/1546.pdf |
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| Ippolito, J.A.; Bjorneberg, D.L.. |
| Water flowing in irrigation furrows detaches and transports soil particles and subsequently nutrients such as phosphorus. To reduce the risk of erosion and offsite phosphorus transport, producers in south-central Idaho have been converting from furrow to sprinkler irrigation. We completed research on soil phosphorus dynamics in furrow versus sprinkler irrigated soils from four paired-fields in the region. Surface soils (0-2.5 inches) were obtained from fields in September following barley harvest. Furrow irrigated soils contained 38 parts per million of plant-available phosphorus (i.e. Olsen-extractable), on average, as compared to 20 parts per million under sprinkler irrigation. These results are important as 20 parts per million extractable... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Furrow irrigation; Sprinkler irrigation; Soil. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1573/1/1529.pdf |
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| Letey, J.; Sojka, R.E.; Upchurch, D.R.; Cassel, D.K.; Olson, K.R.; Payne, W.A.; Petrie, S.E.; Price, G.H.; Reginato, R.J.; Scott, H.D.; Smethurst, P.J.; Triplett, G.B.. |
| Tipo: Article |
Palavras-chave: Soil quality; Mass Import - autoclassified (may be erroneous). |
| Ano: 2003 |
URL: http://eprints.nwisrl.ars.usda.gov/168/1/1111.pdf |
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| Dungan, R.S.; Bjorneberg, D.L.; Leytem, A.B.. |
| In this study we conducted simulated spray irrigation events of dairy wastewater to assess the impact of pressure and sprinkler type upon post-sprinkler culturable microorganism concentrations. Dairy wastewater was sampled before and after it was pumped through sprinklers typically used on center pivot irrigation systems. Three different sprinklers types were used at three different operating pressures to give a range of water drop sizes. The microorganisms quantified in this study were total coliforms, Escherichia coli, Clostridium perfringens, heterotrophic bacteria, and coliphage. In most cases the pre- and post-sprinkler concentrations were determined to be statistically similar, suggesting that culturable viability was not affected when wastewater... |
| Tipo: Article |
Palavras-chave: Sprinkler irrigation; Manure. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1444/1/1409.pdf |
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| Registros recuperados: 1.593 | |
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