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Influence of potassium fertilizer and plant density on yield components of sown and ratooned upland kangkong (Ipomoea aquatica Forsk.) / A.R. Linneman...[et al.].
- Agricultural university. Department of tropical crop science,
- 1986.
- Wageningen :
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Bambara groundnut (Vigna subterranea (L.) Verdc.) : an annotated bibliography / Anita R. Linneman.
- Agricultural university. Department of tropical crop science,
- 1986.
- Wageningen :