A five-year fertilizer trial with apples on a sandy soil; the effect on magnesium deficiency, foliage and fruit composition, and keeping quality.

Authors

  • J. van der Boon
  • A. Das
  • A.C. van Schreven

DOI:

https://doi.org/10.18174/njas.v14i1.17471

Abstract

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)

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Published

1966-02-01

Issue

Vol. 14 No. 1 (1966)

Section

Papers

License

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