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Suleiman Usman
Suleiman Usman is the author of "Bio-Organic Manure", "Agricultural Soil Environment", "Understanding Soil" and "The Basic Soil Problems and Possible Solutions in Agriculture".
Books by Suleiman Usman
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Understanding Soil
Usman, Suleiman
Paperback:
$19.95
Agricultural Soil...
Usman, Suleiman
Paperback:
$18.90
Sustainable Soil ...
Usman, Suleiman
Paperback:
$66.90
Environmental Soi...
Usman, Suleiman
Paperback:
$36.50