David E. Clay

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Precision Agriculture Basics: 176 (ASA, CSSA, and SSSA Books)
Shannon, D. Kent; Clay, David E.; Kitchen, Newell R.

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� 23.42

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Practical Mathematics for Precision Farming: 168 (ASA, CSSA, and SSSA Books)
Clay, David E.; Clay, Sharon A.; Bruggeman, Stephanie A.

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� 60.36

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Soil Fertility Management in Agroecosystems: 170 (ASA, CSSA, and SSSA Books)

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� 25.60

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GIS APPLICATIONS IN AGRICULTURE VOLUME 2: NUTRIENT MANAGEMENT FOR ENERGY EFFICIENCY,

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� 66

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