Topics : Soil Fertility for Forage Crops : Maintenance
Download this Fertility: Maintenance document in Adobe PDF format.
Nitrogen Management for Legumes
If legumes were properly inoculated at seeding and are well nodulated, they will have all of the nitrogen they need for optimum production. There is no need to apply supplementary nitrogen to them. Besides being uneconomical, adding nitrogen to a legume stand will not increase yield, and can greatly increase the competition from grass and weeds, which can shorten the life of the stand.
Even though manure is a good source of nitrogen, legumes are generally not a good crop to receive manure. The phosphorus and potassium in the manure can benefit the legume (Table 1), but the nitrogen can't be separated, and would have the potential for those problems outlined above.