Studies on magnesium deficiency of apple trees. II. Varietal differences in leaf composition and petiole analysis in relation to magnesium deficiency

Nagai, K., E.Al.

Bull. Aomori Apple Exp. Stat, 11, 65-72


Accession: 014690216

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Leaf K, Ca and Mg contents of Rails and Jonathan trees grown under the same conditions were compared during 1960-1961, in order to investigate the possible relationships between varietal susceptibility to Mg deficiency and varietal differences in leaf composition. Leaves from Jonathan had a significantly lower K content and K/Mg and K/Ca ratios, but a significantly higher Ca content, than leaves from Rails. There was no significant difference in Mg content between the varieties.