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1. Soil testing and plant analysis for fertilizer recommendations : March 1993-June 1996 (id:7083843)

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2. Soil testing and plant analysis for fertilizer recommendation : January 1991-June 1993 (id:7083842)

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3. The changing fertility of New England soils (id:CAT87209904)

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4. Summer crops for green manure and soil improvement (id:ORC00000463)

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5. Soil conservation (id:ORC00000299)

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6. Fertility of soils as affected by manures (id:ORC00000601)

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7. Soil fertility : an address delivered before the Rich Neck Farmers' Club, of Queen Anne County, Maryland (id:ORC00000436)