Legumes as a nitrogen source – How much do they provide?
Accounting for the available nitrogen credit, you can significantly reduce your cost of production.
- Alfalfa stand (70-100% alfalfa, 4 plants per sq. ft.) = 100 to 190 lbs. of nitrogen per acre
- Alfalfa stand (30-70% alfalfa, 1.5 to 4 plants per sq. ft.) = 70 to 160 lbs. of nitrogen per acre.
- Red clover or birdsfoot trefoil = 80 to 130 lbs. of nitrogen per acre
- Soybean = 1 lb of nitrogen per bushel produced, a maximum credit of 40 lbs. per acre.