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  1. 1
    Published 1993
    Book

    Present situation, problem, prospect and practical implementation program of education and research on problem soils for agricultural production and their countermeasures
  2. 2
    Published 1977
    Book

    The Philippines recommends for soil.
  3. 3
    by Van Dersal, William R.
    Published 1968
    Book

    The land renewed the story of soil conservation.
  4. 4
    by Cook, R. L.
    Published 1962
    Book

    Soil management for conservation and production
  5. 5
    by Sears, Paul Bigelow
    Published 1959
    Book

    Deserts on the marsh
  6. 6
    by Osborn, Fairfield
    Published 1948
    Book

    Our plundered planet.
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