3.
Story of the Soil, from the Basis of Absolute Science and Real Life
by Hopkins, Cyril G. 1866-1919
ISBN: 9781171638537
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Story of the Soil, from the Basis of Absolute Science and Real Life
by Hopkins, Cyril G. 1866-1919
ISBN: 9781178382075
List Price: $32.75
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Soil Fertility and Permanent Agriculture
by Hopkins, Cyril G. 1866-1919
ISBN: 9781176991712
List Price: $49.75
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Story of the Soil, from the Basis of Absolute Science and Real Life
by Hopkins, Cyril G. 1866-1919
ISBN: 9781177009522
List Price: $33.75
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Question Summary to Accompany Soil Fertility and Permanent Agriculture,
by Hopkins, Cyril G. 1866-1919
ISBN: 9781175770684
List Price: $15.75
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Laboratory Manual for Soil Fertility
by Hopkins, Cyril G. 1866-1919...
ISBN: 9781176510470
List Price: $17.75
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Laboratory Manual for Soil Fertility
by Hopkins, Cyril G. 1866-1919...
ISBN: 9781176801905
List Price: $17.75
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Nitrogen Bacteria and Legumes : With special reference to red clover, cowpeas, soy beans, al...
by Hopkins, Cyril G. 1866-1919
ISBN: 9781179481203
List Price: $15.75
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12.
Story of the Soil, from the Basis of Absolute Science and Real Life
by Hopkins, Cyril G. 1866-1919
ISBN: 9781175832108
List Price: $33.75
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14.
Structure of the Corn Kernel and the Composition of Its Different Parts
by Smith, L. H., East, Edward ...
ISBN: 9781245072328
List Price: $15.75
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Thirty Years of Crop Rotations on the Common Prairie Soil of Illinois
by Hopkins, Cyril G. 1866-1919...
ISBN: 9781245204705
List Price: $15.75
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Soil fertility laboratory manual
by Cyril G. 1866-1919 Hopkins,...
ISBN: 9781172759583
List Price: $18.75
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18.
Fertility in Illinois Soils
by Hopkins, Cyril G. 1866, Hop...
ISBN: 9781149373149
List Price: $19.75
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Illinois Crop Yields from Soil Experiment Fields
by Hopkins, Cyril G. 1866, Hop...
ISBN: 9781149399613
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21.
Directions for the Breeding of Corn, Including Methods for the Prevention of In-Breeding
by Hopkins, Cyril G. 1866-1919...
ISBN: 9781149898383
List Price: $15.75
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Soil Treatment for Wheat in Rotations, with Special Reference to Southern Illinois Soils
by Hopkins, Cyril G. 1866-1919
ISBN: 9781149939918
List Price: $15.75
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Soil Treatment for Peaty Swamp Lands, Including Reference to Sand and Alkali Soils
by Hopkins, Cyril G. 1866-1919
ISBN: 9781149939901
List Price: $15.75
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Peaty Swamp Lands : Sand and alkali Soils
by Hopkins, Cyril G. 1866-1919...
ISBN: 9781149932926
List Price: $16.75
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Story of the Soil, from the Basis of Absolute Science and Real Life
by Hopkins, Cyril G. 1866-1919
ISBN: 9781346835518
List Price: $27.95