Project ID



Proper methods and rates for applying livestock manure to crop land are critical to preserve water quality. The growth and concentration of Iowa's swine production facilities in recent years pose environmental concerns in terms of manure application to agricultural land. This project demonstrated a feasible, economical testing program to evaluate the nutrient content of livestock wastes. A portable kit was used that can test for ammonia nitrogen and phosphorus in both liquid and solid manure, facilitating on-site, immediate testing. The results of this on-farm testing kit, which is currently available to producers, were then compared with laboratory analysis to determine the kit's accuracy. By analyzing the nutrient value of manure immediately prior to land application, producers can make more environmentally sound manure management decisions.

Principal Investigator(s)

Jerry W. Long


Greg Brennemen, Kenneth Muller

Year of Grant Completion