By Jerad Jaborek
As a byproduct of raising livestock, “shit happens” literally, and that is no different in a beef feedlot setting. Therefore, as the producer, we must carefully decide how to remove and utilize the manure produced from the cattle in the feedlot. By using the best manure management practices, the field application of manure produced in the feedlot can enhance soil productivity and contribute to overall farm profitability while maintaining proper environmental stewardship to prevent water contamination.
The first step to successful manure management is to determine the Nitrogen (N), Phosphorus (P), and Potassium (K) levels of the manure being produced and of the soil in the fields. The level of these nutrients excreted in the manure can be impacted by the diets being consumed by feedlot cattle. For instance, some by-product feeds have a slightly greater P content and a greater inclusion of them in the diet could cause manure to have a greater P concentration. Likewise, higher protein diets or diets that supply excess protein can lead to greater N excretion, and therefore, a greater N concentration of manure. At the 2009 Cattle Feeder’s Conference: A New Era of Management, Russ Eken, an extension livestock specialist, reported that backgrounding and finishing cattle have been reported to excrete 6.3 lb. of manure per 100 lb. body weight, 0.22 to 0.48 lb. of N, and 0.035 to 0.085 lb. of P per head per day.
Other factors such as feedlot design, stocking density, time of year, and method of manure storage can influence the . . .
Source : osu.edu