Fertilizers and Seed Ratios for Controlling Lucerne Domination in Mixtures

Irrigated lucerne/grass mixtures were treated with annual applications of N‐P fertilizers to determine the extent of control of lucerne domination. Eighty pounds of N with or without associated P sustained the grass components at an acceptable level and increased yields, which were constituted of 2 parts grass for each 3 parts of legume. Where no fertilizer, or P fertilizer only, was used the hay harvested was composed of only 1 part grass for each 8 or 9 parts of lucerne. Lucerne to grass seed‐ratio manipulation did not influence botanical composition nor did it affect fertilizer influence.