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    Ameliorating acid infertile rice soil with organic residue from nitrogen fixing trees by Baggie, I., Zapata, F., Sanginga, N., Danso, S.

    Published 2000
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    Journal Article
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    Field validation of intraspecific variation in phosphorus use efficiency and nitrogen fixation by provenances of Gliricidia sepium grown in low P soils by Sanginga, N., Danso, S., Zapata, F., Bowen, G.

    Published 1994
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    Journal Article

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