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Book
Year: 2003 Publisher: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey,
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Phosphate rock --- Shale --- Phosphoria Formation.
Dissertation
Year: 2003 Publisher: Leuven : KUL. Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen,
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Humid tropics --- Humid tropics --- soil fertility --- soil fertility --- Nutrient availability --- Nutrient availability --- Leaching --- Leaching --- Phosphorus --- Phosphorus --- Phosphate fertilizers --- Phosphate fertilizers --- Green manures --- Green manures --- Tithonia --- Tithonia --- Ion exchange capacity --- Ion exchange capacity --- Measurement --- Measurement --- evaluation. --- evaluation --- Tithonia diversifolia --- Tithonia diversifolia --- Kenya --- Kenya
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