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Original Articles

Leaf analysis in the assessment of nutritional status of apple trees

II. The variation in leaf nitrogen, phosphorus, potassium, magnesium, and calcium between commercial orchards

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Pages 383-388 | Received 15 Jun 1962, Published online: 16 Jan 2012
 

Abstract

Apple leaf sampies from 67 commercial orchards in 2 districts have been analysed in each of 2 seasons. These resuits have been compared with those from fertiliser trials in New Zealand and with critical nutrient levels suggested elsewhere. Many orchards showed high nitrogen and low phosphorus levels but, in most instances, levels of potassium, magnesium, and calcium fell within the suggested limits, Littie difference in nutrient status was noted between apple leaves in the Hawke's Bay and Nelson districts.

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