Knowing yield can help you make informed management decisions. You can estimate potential yield from past history of the field, neighboring fields of similar type, averages for specific forages, and from soils information.
Grow "green manure" to keep soil from eroding, weeds from exploding and to add nutrients.
Predicting Nitrogen Availability from Organic Amendments: laboratory, Field, and Computer Stimulation
A study to improve the ability to predict nitrogen availability from organic soil amendments, including improved accuracy of Nitrogen availability estimates, to target amendment application rates to meet crop N needs.