Selecting the “Right” Legume
K.D. Johnson, Extension Forage Specialist, Department of Agronomy, Purdue University
High yield and quality are the goals of anyone growing hay and pasture crops. Research and experience show that one way these goals can be achieved is with the use of nitrogen-producing legumes, either alone or in combination with grasses.
A Minnesota study confirms the yield advantages of legumes and legume mixtures over pure grass stands (Table 1). Produced under the same conditions, alfalfa or alfalfa-grass combination was shown to give the best results. Grass alone did not begin to match the legume or mixture yields unless fertilized with 100-200 pounds of nitrogen per acre. Similar results would be expected under Indiana conditions.
Merely adding a legume to grass does not, however, guarantee better quality and yield. But chances are it will if it’s the highest producing species capable of thriving in a given field.

