The Living Soil Handbook: The...
Jesse Frost
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Healthy Soils for Sustainable...
Niall Dunne (Editor)
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Plant Nutrition and Soil...
Jr. Jones
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An Agricultural Testament
Albert Howard
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An Agricultural Testament
Albert Howard
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The Non-Toxic Farming Handbook
Wheeler & Ward,
Ronald B Ward
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Soils, Land and Food
Alan Wild
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Secrets of Fertile Soils:...
Erhard Hennig
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Organic Soil Fertility...
Steve Gilman
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An Agricultural Testament
Albert Howard
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Soil Fertility Evaluation and...
Charles A. Black
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Organic Soil-Fertility and...
Steve Gilman
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Soil Carbon: Science,...
Dave Abson (Contributions by),
Steven A Banwart (Editor)
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An Agricultural Testament
Sir Albert Howard
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Bioactive Compounds in...
Lech Wojciech Szajdak (Editor)
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Soil Fertility and...
John L Havlin,
Samuel L Tisdale
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Soils and Societies:...
John R McNeill (Editor),
Verena Winiwarter (Editor)
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Tropical Soil Biology and...
J M Anderson (Editor),
J S I Ingram (Editor)
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Agricultural Testament
Albert Howard
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Soil Fertility and...
John L Havlin,
Samuel L Tisdale
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Fertile Soil: A Grower's...
Robert Parnes
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Soil Fungi and Soil Fertility...
S D Garrett
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Soil Testing: Prospects for...
John Havlin
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Soil Fertility
Henry D Foth,
Boyd G Ellis
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