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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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