Our Soil Resources: Formation and Conservation
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Shows processes of soil formation, the four great soil groups of the earth, the location of these soil groups in the United States, man's exploitation of the soil, and the major scientific farming techniques designed to replace soil fertility losses and stop erosion.
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- 16mm Filmography (legacy record) — title, year, creator, length, format, color, description, catalog record
Original permalink · Record added 2024-04-22 13:56:37