Click on “Download PDF” for the PDF version or on the title for the HTML version.
If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.
Precision and Accuracy in a Nutrient Management Plan utilizing Liquid Manure Application: Expectations and Reality
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 032158, 2003 ASAE Annual Meeting . (doi: 10.13031/2013.14023) @2003
Authors: Ted L. Funk, Matthew J. Robert, Yuanhui Zhang, and Randolph E. Fonner
Keywords: manure application, nutrient management plans
Manure application on land for the purpose of fertilizing crops is a process plagued with uncertainties (errors)
in the calculations, equipment calibrations, performance of the application process and yield of the crop. One errorpropagation
algorithm for combining the component uncertainties arising from each step of the process is proposed. The
largest uncertainties with either a nitrogen based or phosphorus based application approach are the crop yield and on-farm
manure sampling, followed by mineralization rates (nitrogen) and laboratory analysis (nitrogen and phosphorus). For
examples and estimates given in the paper, overall process uncertainties are on the order of 32-34 percent.