A five-year fertilizer trial with apples on a sandy soil; the effect on magnesium deficiency, foliage and fruit composition, and keeping quality.
DOI:
https://doi.org/10.18174/njas.v14i1.17471Abstract
Deficiency of Mg in the foliage was increased by K fertilizing, while N and Ca had no constant effects. There is no Mg deficiency when the K2O/MgO ratio is <0.6 in soil and <6 in the foliage; the MgO content should be at least 110 ppm in soil and 0.3% in the foliage. Application of K decreased leaf Mg more than leaf Ca; treatment with Mg decreased Ca more than K in the foliage. Yields were increased by Mg and decreased by K; Mg produced larger apples but poorer keeping quality. Bitter pit was connected with high K content and K/Ca ratio and low Ca/Mg ratio and Ca level in the foliage. (Abstract retrieved from CAB Abstracts by CABI’s permission)Downloads
Published
1966-02-01
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