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Foliar nutrition of plants of Nicotiana tabacum. Note 1. Absorption of nitrogen via the leaves from solutions of urea sprayed on plants of the variety Round Tip, grown in artificially N-starved soil



Foliar nutrition of plants of Nicotiana tabacum. Note 1. Absorption of nitrogen via the leaves from solutions of urea sprayed on plants of the variety Round Tip, grown in artificially N-starved soil



Tabacco, 61: 291-306. bibl. 22



Tobacco seedlings were transferred to sand cultures with and without N. At the appearance of N-deficiency symptoms, half the deficient plants were sprayed at 3-day intervals with a urea product, a total of 15 g. of urea being supplied to 7 plants. Dry matter in the leaves, but not in the stems, was very significantly increased by spraying. It was, however, still far below the level in plants supplied with a complete nutrient solution.

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