Title: Apple nutrition
Identifier: applenutrition00davi (find matches)
Year: 1941 (1940s)
Authors: Davis, Malcolm B; Hill, H; Canada. Dept. of Agriculture
Subjects: Apples; Apples
Publisher: Ottawa : Dept. of Agriculture
Contributing Library: Agriculture and Agri-Food Canada – Agriculture et Agroalimentaire Canada
Digitizing Sponsor: Agriculture and Agri-Food Canada – Agriculture et Agroalimentaire Canada

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[LLUSTRA1 K»n i 12
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Figs. 1, 2 and 3 portray different expressions of phosphorus-deficient conditions. Fig. 4—Leaf from tree deficient in phosphorus and potassium. Note reddish-brown margins resemble discoloration in phosphorus-deficient leaf Fig. 1, while tip of leaf has greyish scorching typical of potassium deficiency as seen in Fig. 5. Fig. 5—This stage of potassium deficiency is subsequent to Figs. 1 to 4, Illustration 3, and precedes the final broken and ragged appear- ance shown in Illustration 4. Fig. 6—Uniform pale yellowish-green leaf, typical of nitrogen deficiency. Fig. 7—Blistering and burning of the leaf apex due to excessive nitrogen. Fig. 8—Burnt and perforated area due to calcium deficiency.

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