Soil conditions and plant growth Russell, Edward J. Sir, (Edward John), 1872-1965 creator text book London Longmans, Green and co 1915 1915 New ed.
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ENG Growth (Plants) Soils Monographs on biochemistry https://www.biodiversitylibrary.org/bibliography/25111 6427277 agr15001125 10.5962/bhl.title.25111 U.S. Dept of Agr. Library