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Observations on zinc deficiency of apple trees.

Observations on zinc deficiency of apple trees.

Ann. Agron, 1: 362-367

Apple trees bearing pronounced marks of Zn deficiency, complicated by a chlorosis indicating Mg deficiency, underwent considerable improvement after sprinkling with a 1% solution of ZnSO4 neutralized with 0.3% Ca(OH)2. No improvement was effected by a second treatment, neither had spraying the soil with 5% ZnSO4 any effect. The leaves of unaffected trees contained twice as much Zn as the deficient ones.

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Accession: 013777088

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