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41. The Pedosphere and Its Dynamics: A Systems Approach to Soil Science [ Report dead link ]
Online reference book. It explains aspects of soil science e.g. function of soil, soil profiles, soil texture, soil formation, organic matter and the interactions between soil and the air and water.
http://www.pedosphere.com/
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42. Understanding Phosphorus and its Use in Agriculture [ Report dead link ]
This booklet considers the essential need for phosphorus in agriculture. Available as HTML or PDF.
http://www.efma.org/publications/phosphorus/understanding%20phosphorus/contents.asp
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43. Urban Forestry Manual [ Report dead link ]
Produced by the Department of Defense. Contains information on soil fertility, fertilization and management of urban forest.
https://www.denix.osd.mil/denix/Public/Library/Forestry/forestry.html#contents
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Science > Agriculture > Soils > Publications : Web Resources

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