Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
Dynamics Of Measured And Simulated Dissolved Phosphorus In Runoff From Winter-Applied Dairy Manure, Peter A. Vadas, Melanie N. Stock, Francisco J. Arriaga, Laura Ward Good, Krishnapuram G. Karthikeyan, Zachariah P. Zopp
Dynamics Of Measured And Simulated Dissolved Phosphorus In Runoff From Winter-Applied Dairy Manure, Peter A. Vadas, Melanie N. Stock, Francisco J. Arriaga, Laura Ward Good, Krishnapuram G. Karthikeyan, Zachariah P. Zopp
Plants, Soils, and Climate Faculty Publications
Agricultural P loss from fields is an issue due to water quality degradation. Better information is needed on the P loss in runoff from dairy manure applied in winter and the ability to reliably simulate P loss by computer models. We monitored P in runoff during two winters from chisel-tilled and no-till field plots that had liquid dairy manure applied in December or January. Runoff total P was dominated by nondissolved forms when soils were bare and unfrozen. Runoff from snow-covered, frozen soils had much less sediment and sediment-related P, and much more dissolved P. Transport of manure solids was …
Quantifying The Impact Of Seasonal And Short-Term Manure Application Decisions On Phosphorus Loss In Surface Runoff, Peter A. Vadas, Laura Ward Good, William E. Jokela, Krishnapuram G. Karthikeyan, Francisco J. Arriaga, Melanie N. Stock
Quantifying The Impact Of Seasonal And Short-Term Manure Application Decisions On Phosphorus Loss In Surface Runoff, Peter A. Vadas, Laura Ward Good, William E. Jokela, Krishnapuram G. Karthikeyan, Francisco J. Arriaga, Melanie N. Stock
Plants, Soils, and Climate Faculty Publications
Agricultural phosphorus (P) management is a research and policy issue due to P loss from fields and water quality degradation. Better information is needed on the risk of P loss from dairy manure applied in winter or when runoff is imminent. We used the SurPhos computer model and 108 site–years of weather and runoff data to assess the impact of these two practices on dissolved P loss. Model results showed that winter manure application can increase P loss by 2.5 to 3.6 times compared with non-winter applications, with the amount increasing as the average runoff from a field increases. Increased …