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The story of the soil, from the basis of absolute science and real life

Author(s): Hopkins, Cyril G.
Publisher(s): R. G. Badger
Contributor(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Category: Others

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Soil fertility and permanent agriculture

Author(s): Hopkins, Cyril G.
Publication Date: [c1910]
Publisher(s): Ginn
Contributor(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Category: Others

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For Better crops

Author(s): Hopkins, Cyril G.
Publication Date: c1911.
Publisher(s): [Issued by the I. H. C. service bureau], International harvester company of America (incorpated)
Contributor(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Category: Others

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Laboratory manual for soil fertility

Author(s): Pettit, James Harvey - Hopkins, Cyril G.
Publication Date: 1905]
Publisher(s): Univ. of Illinois
Contributor(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Category: Others

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Soil bacteria and phosphates

Author(s): Hopkins, Cyril G. - Whiting, Albert L.
Publisher(s): University of Illinois Agricultural Experiment Station
Contributor(s): Biodiversity Heritage Library
Collection(s): Biodiversity Heritage Library
Category: Others

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Biodiversity Heritage Library (5)

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