How crops feed
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More by Samuel William Johnson
![[Explanations concerning the analysis of fertilizers and the valuation of their active ingredients]](https://covers.openlibrary.org/b/id/6736187-L.jpg)
[Explanations concerning the analysis of fertilizers and the valuation of their active ingredients]
Essays on peat, muck, and commercial manures
From the letter-files of S. W. Johnson
From the letter-files of S.W. Johnson, professor of agricultural chemistry in Yale University, 1856-1896, director of the Connecticut Agricultural Experiment Station, 1877-1900
How crops grow
Peat and its uses
Peat and its uses