grape yield

1Natural Resources Management and Environmental Sciences. College of Food, Agriculture and Environmental Sciences, California Polytechnic State University, One Grand Avenue, San Luis Obispo, CA 93407;

3Department of Viticulture and Enology, University of California Davis, One Shields Avenue, Davis, CA 95616.

2Department of Land, Air and Water Resources, University of California Davis, One Shields Avenue, Davis, CA 95616;