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5
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Foliar diagnosis, nutrition and yield stability of black peper (Piper nigrum L) in Sarawak / by P.W.F. de Waard.
- Royal tropical institute. Department of agricultural research,
- 1969.
- Amsterdam :
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Fertilizer requirements of cacao (Theobroma cacao L.) in South-Western Nigeria / by M. Wessels.
- 862.9
- Royal tropical institute. Department of agricultural research,
- 1971.
- Amsterdam :
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Kola : its botany and cultivation / by C.L.M. van Eijnatten.
- 862
- Royal tropical institute. Department of agricultural research,
- 1969.
- Amsterdam :
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Problem areas and prospects of production of pepper (Piper nigrum L.) : an overview / P.W.F. de Waard.
- Royal tropical institute. Department of agricultural research,
- 1980.
- Amsterdam :
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Report on the World soy protein conference, Munich, Nov. 11-14, 1973 / by G.L. Thio.
- Royal tropical institute. Department of agricultural research,
- 1973.
- Amsterdam :