Nitrogen Management on Fall Manure Applied Fields Using Intensive Grid Nitrate Sampling and Nitrogen Modeling

Jason Gillis

While manure is a great source of many nutrients when growing corn, the natural variability of nutrient concentrations can create challenge. The nutrient management plan used on these fields should be different than fields utilizing strictly commercial fertilizer. This is especially true when making a nitrogen plan. Nitrogen is highly variable within all soils due to its chemistry. BY adding a source of nitrogen manure, that is not a uniform source of N either, the variance with the field only increases. Many growers must use manure as a fertilizer source do to the need of emptying storage pits. But beyond the logistics, manure provides a wide range of benefits beyond just nutrient value. Due to these and other factors, manured fields will continually be part of the crop rotation along with the need to manage it uniquely.