Effect of cover crops established at time of corn planting on phosphorus runoff from soils before and after dairy manure application.(case study)

Journal of Soil and Water Conservation, November, 2005 by Kleinman, P.J.A.; Salon, P.; Saporito, L.S.; Sharpley, A.N.

Phosphorus (P) runoff from agricultural soils is a concern due to eutrophication. The simultaneous corn and cover crop system was developed by U.S. Department of Agriculture's Natural Resources Conservation Service (USDA-NRCS) for dairy farms in the northeastern United States, where short growing seasons have limited fall seeding of cover crops. The simultaneous corn and cover crop system uses post-emergence imidazolinone herbicides to allow for simultaneous seeding of cover crops with silage corn. Trials were established at two locations in the Cannonsville Reservoir watershed, New York, part of New York City's drinking water supply system, to assess the effects of this cover cropping system on water quality. Rain simulations (60 mm [hr.sup.-1]) were conducted to evaluate the...

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