Shall we use natural rock phosphate or manufactured acid phospate for the permanent improvement of Illinois soils?
Hopkins, Cyril G.
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https://hdl.handle.net/2142/33085
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Title Shall we use natural rock phosphate or manufactured acid phospate for the permanent improvement of Illinois soils? Author(s) Hopkins, Cyril G. Contributor(s) University of Illinois at Urbana-Champaign. Agricultural Experiment Station Issue Date Jan 1909 Keyword(s) Phosphatic fertilizers. Phosphate rock. Publisher Urbana, Ill. : University of Illinois, Series/Report Name or Number Circular, University of Illinois, Agricultural Experiment Station ; no. 127 Type of Resource text Language eng Permalink http://hdl.handle.net/2142/33085 Copyright and License Information Copyright Jan 1909 Board of Trustees University of Illinois.
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