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  1. 1

    Root and tuber crops / by Sastrapradja, Setijati

    Published 1981
    Book
  2. 2

    Use of vertical root observation tubes in an irrigated grey clay soil / by Barrs, H. D.

    Published 1993
    Book
  3. 3

    Working with farmers in Cameroon and Rwanda : new strategies to improve staple food crops / by Simarski, L.

    Published 1992
    Book