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This article in SSSAJ

  1. Vol. 27 No. 2, p. 236-238
     
    Received: Mar 29, 1962
    Published: Mar, 1963


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doi:10.2136/sssaj1963.03615995002700020043x

Effect of N, P, and K Fertilization on Yield and Sugar Content of Sap of Sugar Maple Trees1

  1. Kenneth G. Watterston,
  2. Albert L. Leaf and
  3. John H. Engelken2

Abstract

Abstract

Sap yield, sap sugar concentration, and sugar yield data from sugar maple trees collected over 3 years revealed great intra- and interseasonal variations. The effect of N, P, and K fertilizers, applied singly and in combination, affected the yield of sugar by affecting sap yield and/or sap sugar concentration. The combination fertilizer depressed sugar yield the first sap flow season after treatment and increased this yield in the second season. The N or K fertilizer resulted in little change in sugar yield over the control trees while P fertilizer produced a significant effect on sap sugar concentration, thus affecting sugar yield.

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