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.
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.
Some higher elevation vineyards respond dramatically to phosphorus fertilizer
The authors thank Don Edwards, Department of Pomology, U.C., Davis, for taking most of the photographs.