Manure is a valuable resource that can supply essential crop nutrients to displace the need for commercial fertilizers and organic matter to improve soil structure. Efficient utilization of manure can substantially reduce your production costs and protect our environment.
Reasons to Test
The nutrient content of manure can vary widely. The nutrient content of manure is influenced by the animal species, the growth stage of the animal, the feed composition, the amount and type of bedding used, the moisture content, and other foreign material present such as parlor waste. The only way to be sure of what you are applying is to have your manure tested by a laboratory.
Interpretation of Results
Your manure analysis results will contain Percent Moisture, Total Nitrogen (N), Total Phosphate (P2O5), and Total Potassium Oxide (K2O). Approximately ½ of the Nitrogen in manure is Ammonia, and will be readily available for plant use. The remaining 50% of the Nitrogen is in the organic form. Organic Nitrogen will not be available for crop uptake until soil micro-organisms convert it to mineral forms. In general, ½ of the organic Nitrogen will become available each year. It is important to note that if manure is not incorporated shortly after it is applied, significant amounts of ammonia can be lost through volatilization, and the Nitrogen credit should be reduced accordingly. Manure-available Phosphate (P2O5) and Potassium (K2O) estimates range from 50% to 100%. It is safe to assume that 75% of the P2O5 and K2O found in your manure will be available for plant use. Your manure analysis report should be coupled with a recent soil analysis report when determining optimum Phosphate (P2O5) and Potassium (K2O) application rates. It is not recommended to apply manure to fields testing greater than 150 ppm (300 lbs / acre) of Phosphorus (P2O5).
Obtaining a representative sample of the manure is essential in determining a proper manure nutrient credit from a manure analysis report.
• Dry Manure - Take several samples from different areas and combine them, mixing thoroughly. Take a composite sample from this mixture to send to the lab.
• Liquid Manure - Sample lagoons after they have been agitated. If agitation is not possible, take several samples from different areas and combine them, mixing thoroughly. Take a composite sample from this mixture to send to the lab. A second option is to sample at intervals during application.
After the samples have been collected, fill a 1 pint plastic container ¾ full. Squeeze the air out of the container before sealing. This will allow for expansion from fermentation to occur without bursting the container. It is wise to place the information sheet in a separate plastic bag before shipping.
Results can be reported by Email, phone or fax upon customer request.
Manure Submittal Form