Research note NE-(series). NE-158. Effects of various combinations of nitrogen, phosphorus, and potassium on paper birch seedling growth [with list of references; by John C. Bjorkbom].
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Effects of various combinations of nitrogen, phosphorus, and potassium on paper birch seedling growth [with list of references; by John C. Bjorkbom].
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Research note NE-(series). NE-158. Effects of various combinations of nitrogen, phosphorus, and potassium on paper birch seedling growth [with list of references; by John C. Bjorkbom].