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  1. 1
    Published 1988
    Book

    Green manure in rice farming proceedings of a symposium, 25-29 May 1987.
  2. 2
    Published 1988
    Book

    Green manure in rice farming the role of green manure crops in rice farming systems, 25-29 May 1987.
  3. 3
    by Vergara, Benito S.
    Published 1984
    Book

    Ang talamdan sa pagtanum sa humay
  4. 4
    Published 1978
    Book

    Preliminary report on the international trial on nitrogen fertilizer efficiency in rainfed wetland rice, 1st-.
  5. 5
    Published 1975
    Book

    International trial on nitrogen fertilizer efficiency in rice, 1st-.
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