Varietal improvement and agronomy research in Malaysia

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dc.creatorTan, Swee Lian
dc.date1998
dc.date2017-06-20T09:00:16Z
dc.date2017-06-20T09:00:16Z
dc.date.accessioned2026-06-27T14:33:36Z
dc.descriptionOver the period 1994-1996, seven batches of seeds and two of meristem tissue cultures were evaluated and selected. As important as root yield is the trait starch content (or dry matter content) if a clone is to be accepted as a starch cultivar. At the time of reporting a number of clones have been identified as having yield levels similar to the high-yielding early cultivar MM 92, while showing dry matter contents equivalent to that of the commercial starch cultivar Black Twig. Two of these promising clones have also been evaluated positively for processing into oil fried crisps, a popular local snack. Agronomic research included various studies on nutrient inputs and the effects of flooding on cassava performance when the crop is planted on drained peat. With the early cultivar MM 92, fertilizer inputs may be halved and applied once every alternate cropping without affecting root yields. While the effect of Ca application was not clear-cut, there was some indication that Ca applied as a 9 % foliar solution of Ca(NO3)2 or as 1 ,500 kg/ha of CaCO3 to the soil improved root dry matter content. Solid wastes from starch processing factories may be returned to the soil at the rate of 1.0-1.5 t/ha as a supplement to chemical fertilizer inputs. MM 92, in contrast to 12- month Black Twig (critical stage at 3 1/2 months), showed the greatest yield reduction when flooding occurred at 4-5 months after planting. Four days of continuous flooding resulted in yields declining as much as 45%.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/81977
dc.identifier.urihttp://hdl.handle.net/123456789/81721
dc.languageen
dc.publisherInternational Center for Tropical Agriculture
dc.publisherRegional Cassava Program for Asia
dc.rightsOpen Access
dc.sourceTan, Swee Lian. 1998. Varietal improvement and agronomy research in Malaysia . In: Howeler, Reinhardt H. (ed.). Regional Workshop Cassava Breeding, Agronomy and Farmer Participatory Research in Asia (5, 1996, Hainan, China). Cassava breeding, agronomy and farmer participatory research in Asia: Proceedings . Centro Internacional de Agricultura Tropical (CIAT), Regional Cassava Program for Asia, Bangkok, TH. p. 340-354.
dc.subjectmanihot esculenta
dc.subjectbreeding
dc.subjecthigh yielding varieties
dc.subjectselection
dc.subjectgermplasm
dc.subjectclones
dc.subjectcrop yield
dc.subjectharvest index
dc.subjectdry matter content
dc.subjectfertilizer application
dc.subjectfitomejoramiento
dc.subjectvariedades de alto rendimiento
dc.subjectselección
dc.subjectgermoplasma
dc.subjectrendimiento de cultivos
dc.subjectindice de cosecha
dc.subjectcontenido de materia seca
dc.subjectaplicación de abonos
dc.titleVarietal improvement and agronomy research in Malaysia
dc.typeBook Chapter

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