Levi Stockbridge and the Stockbridge principle of plant feeding. Extract from tribute by William H. Bowker read at the memorial exercises at Amherst, 1904
Bound with a collection of pamphlets from various sources, relating to soils, 1850-1914, including: The problem of fertility in the middle west : Address / prepared by W.H. Bowker and Horace Bowker and read ... in Chicago Jan. 9, 1914
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