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Studies on the microbial ecology of soils from Pinus radiata (D. Don) forests

Noonan, M. J.Lincoln College, University of Canterbury1969

… cause o£ the decline was a deficiency of nitrogen highlighted by the low levels of nitrogen in the leaves of the second crop trees, especially those growing on ridge sites. Numerous field trials have been laid out but many of the trials were poorly designed and consequently could not …

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