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The development and evaluation of a new method of estimating the resources of apple trees is described. The method is based on the estimation of dry matter extracted after boiling for 2 h. with 5% w/v trichloroacetic acid (T.C.A.) and 35% v/v methanol in aqueous solution, followed by extraction with water in a Soxhlet apparatus.
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G. A. Priestley (1965) studied this question.
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