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Soil Science Society of America Journal Abstract -

Effects of Nitrogen and Phosphorus Fertilization on Juvenile Growth of Planted Yellow Poplar on an Eroded Old Field1


This article in SSSAJ

  1. Vol. 34 No. 2, p. 312-313
    Received: Aug 22, 1969
    Accepted: Oct 7, 1969

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  1. R. E. Farmer Jr.,
  2. E. A. Snow and
  3. J. W. Curlin2



In a yellow poplar (Liriodendron tulipfera L.) plantation, three levels of nitrogen (0, 336, 672 kg/ha) and phosphorus (0, 168, 336 kg/ha) fertilizer applied at planting were tested in factorially arranged experiment with a split plot design. Nitrogen fertilizer was applied in holes near trees by two methods: loose and in perforated plastic bags.

Survival after 5 years was 56% and was not influenced by treatment. Both nitrogen and phosphorus stimulated growth during the first 2 years after planting but phosphorus was effective only when combined with nitrogen fertilization. During this period, loose application of nitrogen fertilizer gave better results than bagged application. After 5 years, only nitrogen effects were statistically significant; mean height (2.59 m) of trees in the most effective nitrogen treatment (672 kg/ha) was 80% greater than controls.

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