Six-year basal area responses to nitrogen fertilizer, either alone or in combination with sulphur, were compared with pre-treatment measures of foliar nitrogen and sulphur in 31 lodgepole pine stands in the Interior of British Columbia. Results from this analysis indicate that pre-fertilization levels of foliar nitrogen, sulphur, and inorganic sulphate-sulphur are useful for predicting whether lodgepole pine will respond significantly to fertilization with either nitrogen alone or a combination of nitrogen and sulphur, and for estimating the magnitude of the expected responses. By using these tools, the chances of making the appropriate fertilizer prescription may be significantly improved.
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Updated April 19, 2007