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- Author or Editor: J. W. Wells x
- Journal of the American Society for Horticultural Science x
Abstract
Application of limestone to a Cahaba sandy loam increased exchangeable soil Ca and decreased extractable soil Al and Mn. Leaf tissue composition of ‘Calhoun Gray’ and ‘Dixielee’ watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] was significantly influenced by soil pH. Increased levels of limestone significantly increased tissue Ca and reduced tissue Al and Mn concentrations. High soil acidity was closely associated with high tissue Mn in both cultivars. Tissue Al levels were not as sharply reduced by increasing soil pH as were tissue Mn levels. Tissue Al influences on yield were not significant in either cultivar at any soil pH. In nonlimed plots, ‘Calhoun Gray’ tissue Mn was highly correlated with depressed crop yield, while ‘Dixielee’ produced no marketable fruit at soil pH 5.0. Foliar Mn toxicity symptoms were observed on the 2 cultivars at soil pH 5.0. Maximum watermelon yield was obtained at soil pH 6.0 on plots that received 112 kg N/ha.