Conversion of chaparral-covered watersheds to native grasses and forbs resulted in production of significantly more surface water runoff—without appreciable erosion after conversion—in southern California test areas. Grazing potential of the watersheds was also greatly increased and wildfire hazards reduced.

The plots discussed were on the Santa Rosa Ranch of the Vail Co. Mr. Louis L. Roripaugh, Manager for that organization, was particularly helpful. The work was supported by Hatch Act funds and by Western Regional Research Project W-32.