Posted in Nutrient Management on May 21st, 2012
Julia Knight1, Quirine Ketterings1, Karl Czymmek1,2, and Rich Wildman3 1Nutrient Management Spear Program, Department of Animal Science, Cornell University, 2PRODAIRY, Dept. of Animal Science, Cornell University, and 3Agricultural Consulting Service Inc. Introduction Phosphorus enrichment of surface waters leading to algal blooms and other issues related to eutrophication continues to be an issue in a number [...]
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Posted in Nutrient Management on May 11th, 2012
Quirine Ketterings1 and Karl Czymmek1,2 1Nutrient Management Spear Program, 2PRODAIRY, Department of Animal Science, Cornell University Introduction The New York Phosphorus Index (NY-PI) was introduced in 2001. Since then, phosphorus (P) fertilizer sales (farm use) declined from 36,506 tons of P2O5 in 2001 (19.5 lbs P2O5/acre) to 18,610 tons P2O5 in 2009 (10.2 lbs P2O5/acre). [...]
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Posted in Nutrient Management on May 9th, 2012
Bianca Moebius-Clune, Harold van Es, and Jeff Melkonian, Department of Crop and Soil Sciences, Cornell University For over fifteen years, the corn stalk nitrate test (CSNT; Binford et al., 1992; Blackmer & Mallarino, 1996) has been promoted as a tool to determine whether a corn crop received deficient, adequate, or excessive nitrogen (N) amounts during [...]
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