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Effects of Nitrogen and Phosphorus Fertilization on Juvenile Growth of Planted Yellow Poplar on an Eroded Old Field
Author(s) -
Farmer R. E.,
Snow E. A.,
Curlin J. W.
Publication year - 1970
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1970.03615995003400020036x
Subject(s) - sowing , nitrogen , phosphorus , human fertilization , agronomy , fertilizer , nitrogen fertilizer , field experiment , juvenile , zoology , environmental science , chemistry , biology , ecology , organic chemistry
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.