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Soil Science Society of America Journal Abstract -

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


This article in SSSAJ

  1. Vol. 27 No. 2, p. 236-238
    Received: Mar 29, 1962
    Accepted: Oct 26, 1962

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



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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