Biological Systems Engineering



Charles A. Shapiro

Date of this Version



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


Nitrate contamination of groundwater was first detected in Holt County, Nebraska in the mid- 1960’s. From 1976 to 1990, nitrate-N concentrations increased in 90 percent of the wells sampled by the Natural Resource Districts (NRD) in the county. As a consequence of the concerns associated with this increase, the Holt County Manure Management Education Project was funded by an EPA-319 grant with cooperation among UNL Cooperative Extension, UNL Conservation and Survey Division, USDA-NRCS, the Lower Niobrara NRD, and the Upper Elkhorn NRD. The goal of the project was to educate producers on cropping and manure best management practices to protect water resources from contamination. The project centered around demonstrating best management practices that were cost effective and that could be used in existing production facilities.