Applying a balance of nitrogen, phosphorus and potassium (N-P-K) in annual ryegrass optimizes its yield, quality, animal performance and profit, according to Rocky Lemus, Extension researcher, Mississippi State University.
Twenty-five fertilizer treatments were applied to fall-seeded Jackson annual ryegrass, with 100 lbs/acre N applied in a split application three weeks after establishment and in spring after first harvest. Treatments containing N, P and K at different ratios produced higher yields than some treatments containing only N.