Phosphorus deficiency in California vineyards
James A. Cook, University of California
William R. Ward
Alan S. Wicks, Department of Viticulture and Enology
California Agriculture 37(5):16-18. DOI: 10.3733/ca.v037n05p16.
Some higher elevation vineyards respond dramatically to phosphorus fertilizer
James A. Cook is Professor, Department of Viticulture and Enology, University of California, Davis; William R. Ward is Vineyard Superintendent, Chappellet Vineyards; Alan S. Wicks is Graduate Student, Department of Viticulture and Enology, U.C., Davis.
The authors thank Don Edwards, Department of Pomology, U.C., Davis, for taking most of the photographs.