Dry summers work to the producer's disadvantage, and germination of summer - fall seeded sweat clover is risky. A Canadian study, reported in 1996, looked at alternatives to summer-fallowing and what effect these alternatives had on subsequent wheat and barley crops. The following table summarizes the average yields of the various crops during the 1984-88 study. Perry Miller says the seasons were quite dry when the following table data was gathered. The amount of nitrogen fixed varies according to the legume species and variety.
Nitrogen fixation is affected by the level of available nitrogen in the soil.
High soil nitrogen reduces nitrogen fixation, because legumes prefer to use most available soil nitrogen before beginning to fix atmospheric nitrogen. You are the 1082nd person to access this page.