 |
When applying manure to fields as fertilizer, accurate rates make
sense from all angles—economic, agronomic, and environmental.
Ensuring an accurate application rate involves determining the nutrient
content of the manure on your farm, crop nutrient needs, and field
application rates.
The preferred way to determine the nutrient content of livestock
manure is to have it tested. The nutrient content can vary according
to the storage system, animal diet, and various other factors. Therefore,
collect a series of samples from each manure storage system or feedlot
and have them analyzed annually.
|
 |
Manure
is relatively high in phosphorus and low in nitrogen compared to most
crops' needs for those nutrients. Therefore, from an economic, environmental,
and agronomic perspective, it usually makes more sense to base your
application rate on the P content of manure. This generally means
you have to add supplemental nitrogen fertilizer, but doing so easily
fits into most systems. |