Nitrogen fertilizers applied to range-land in amounts greater than the forage plants require during the first growing season produced increased yields in the second and third seasons in tests in Modoc County.

Rancher Rob Flourney of Likely, California, W. A. Williams, Assistant Professor of Agronomy, and R. A. Evans, Assistant Specialist in Agronomy, University of California, Davis, and W. E. Martin, Extension Soils Specialist, University of California, Berkeley, cooperated in the studies reported in this article.