Although more than a dozen varieties are grown in California, two barley varieties occupy the bulk of California's 1,500,000 acres in this crop. California Mariout, which is planted on 55 per cent of the acreage, is widely grown in the San Joaquin and Imperial Valleys, and is recommended for late planting in the Sacramento Valley. The second variety, Arivat, comprises about 18 per cent of the barley acrcage. It is planted primarily in the Sacramento Valley, in the northern part of the San Joaquin Vallcy, and in coastal areas.

Data from locations other than Davis were obtained with the cooperation of University of California farm advisors and Field Station personnel.