Abstract
Rootstocks have been shown (7, 8, 9, 11, 13) to exert an influence on tree growth, disease resistance, and fruit quality factors of various types of citrus. Recent work in California (5, 6) in which the leaves of orange, grapefruit, and lemon trees on a large number of different rootstocks were analyzed for several nutritive elements, strongly suggests that the amounts of these minerals in the scion leaves may be affected by the rootstock used. Since one of the objectives of the nutritional research program at this station is an attempt to associate the mineral composition of citrus leaves with tree performance, fruit quality, and fertilizer utilization, it is desirable to know as much as possible about the effect of rootstock on the mineral content of the leaves. Some information on eleven nutrient elements has been obtained with Valencia orange trees on six different rootstocks, under Florida conditions, and is presented herewith.
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