Recommended CitationMcNiel, R. E., and P. L. Carpenter. Nitrogen Availability to Woody Plant Species as Influenced by Nitrogen Fixation : Interim Report. Publication FHWA/IN/JHRP-72/13. Joint Highway Research Project, Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 1972. doi: 10.5703/1288284313817.
Joint Highway Research Project
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