Thirty Years Farming on the Clifton Park System

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Tree Crops: a permanent agriculture

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The Farm That Won’t Wear Out

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Soil Microorganisms and Higher Plants

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Root Development of Vegetable Crops

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Root Development of Field Crops

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On Farming

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Plowman’s Folly

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The Farming Manual: A Guide to Farm Work

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More Food From Soil Science: The Natural Chemistry of Lime in Agriculture

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Olena Farm, U.S.A.: An Agricultural Success Story

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