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  1. 1
    Annual cropping systems in the tropics : an introduction /
    Book
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  2. 2
    Management of biological nitrogen fixation for the development of more productive and sustainable agricultural systems : extended versions of papers presented at the Symposium on Biological Nitrogen Fixation for Sustainable Agriculture at the 15th Congress of Soil Science, Acapulco, Mexico, 1994 /
    Conference Proceeding Book
    Published 1995
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  3. 3
    Irrigation management for diversified cropping /
    Book
    Published 1987
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  4. 4
    Traditional African farming systems in eastern Nigeria : an analysis of reaction to increasing population pressure /
    Book
    by Lagemann, Johannes, 1948-
    Published 1977
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  5. 5
    Agricultural policy and sustainability : case studies from India, Chile, the Philippines, and the United States /
    Book
    Published 1993
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  6. 6
    Multi-period budgeting and the economic assessment of perennial crop intercropping systems /
    Book
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  7. 7
    International rice research newsletter.
    Journal
    Published 1976
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  8. 8
    International rice research notes.
    Journal
    Published 1993
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  9. 9
    Biological nitrogen fixation in farming systems of the Tropics /
    Book
    Published 1977
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  10. 10
    Cropping systems, structural change and rural-urban migration in Brazil /
    Book
    by Saint, William S.
    Published 1979
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  11. 11
    Symposium on cropping systems research and development for the Asian rice farmer /
    Conference Proceeding Book
    Published 1977
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