LIBROS DEL AUTOR: paul w unger

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  • Soil and Water Conservation Handbook
    Paul W. Unger
    Concise, compact, and encyclopedic, this handbook covers the policies, practices, conditions, and terms related to soil and water conservation. It includes more than 700 entries presented in a practical, non-technical format. Acclaimed soil scientist Dr. Paul Unger draws on his 35 years of experience researching the effects of tillage, crop residues, and soil management and his...
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