Biological Systems Engineering


Date of this Version



Published by University of Nebraska – Lincoln’s Livestock Environmental Issues Committee.


Integrating Animal Feeding Decisions into CNMP Processes: Part 1

Environmental planning in animal production systems often requires an estimate of nutrient excretion. Standard values published by the Natural Resources Conservation Service (NRCS) (SCS 1992), American Society of Agricultural Engineers (ASAE 1999), and MidWest Plan Service (MWPS 2000) commonly have been used for this purpose. However, these current procedures do not reflect the impact of producers' animal dietary decisions on nutrient excretion. The increasing variety of feed ingredient options, changes in nutritional programs to match improving genetic potential, and feeding strategies designed to reduce nutrient excretion are influencing the amount of nutrient excretion. Standard methods for estimating nutrient excretion need to reflect animal feed strategies and integrate feeding decisions into a Comprehensive Nutrient Management Plan (CNMP).