TY - JOUR T1 - Correction of Zinc Deficiency in California Vineyards by Soil Treatment JF - American Journal of Enology and Viticulture JO - Am J Enol Vitic. SP - 223 LP - 229 DO - 10.5344/ajev.1963.14.4.223 VL - 14 IS - 4 AU - James A. Cook AU - Howard L. Malstrom1 Y1 - 1963/01/01 UR - http://www.ajevonline.org/content/14/4/223.abstract N2 - Zn-EDTA and zinc sulfate at 150 and 750 lb per acre, respectively, were used as soil treatments to correct zinc deficiency of grapes on a sandy, neutral soil with relatively low fixing power for zinc. Both resulted in striking increases in fruit production. Although tissue analysis 9 years later showed higher zinc levels in treated vines, the practical effect on yields ended 3 years after treatment.A one-year Zn-EDTA foliage spray treatment also resulted in greatly increased fruit yield, but without zinc treatment the following year, the second-year yields were appreciably lower than those from control plots.Effects of lower soil treatment rates and factors affecting foliar absorption need further investigation. ER -