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Predicting Loblolly Pine Growth Response from N Fertilizer, using Soil‐N Availability Indices
Author(s) -
Lea Russ,
Ballard Russ
Publication year - 1982
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/sssaj1982.03615995004600050043x
Subject(s) - nitrogen , human fertilization , anaerobic exercise , chemistry , fertilizer , incubation , agronomy , soil test , zoology , litter , soil water , environmental science , biology , soil science , physiology , biochemistry , organic chemistry
Mineralizable nitrogen (N) fractions extracted from surface soil by 2 N KCl, anaerobic or aerobic laboratory incubation, autoclaving, and dilute acid were not significantly correlated to five‐year volume growth response to N fertilization, site index, or N levels of foliage or litterfall. Site index was significantly and directly correlated to foliar N concentrations and inversely correlated to the surface soil C/N ratio. The amounts of N extracted by anaerobic and aerobic laboratory incubations could be significantly predicted, using total soil N and soil acidity.