Descubre y comparte nuestro conocimiento público

Se han encontrado 7 recursos

Resultados de búsqueda

Six weight-classes of white guinea yam (Dioscòrea rotundata Poir.) setts—2–5, 5.01–10, 10.01–20, 20.01–30, 30.01–40, and 40.01–50 g—were presprouted in fresh, moist sawdust in open-air, propagation beds. The 2–5 g and 5.01–10 g classes were described as microsetts. Three natural groups patterned ...


Gyansa-Ameyyaw, C.E.Hahn, S.K.Álvarez, M.N.Doku, E.V.[Determination of optimum sett size for white guinea yam (Dioscorea rotundata Poir.) seed yam production: trends in sprouting in the presprout nursery and field performance]Determination of optimum sett size for white guinea yam (Dioscorea rotundata Poir.) seed yam production: trends in sprouting in the presprout nursery and field performance

Mulching of yam seed beds reduced soil temperature and improved emergence, time of emergence, yield per hill and the total yield of Dioscorea rotundata yams on a sandy soil in Western Nigeria. Comparison of mounds with ridged and flat seed beds showed that these different treatments had no signif...

L'utilisation de paillis dans les lits de plantation reduit la temperature du sol et favorise la levee, Ie temps d'emergence, Ie rendement par poquet et Ie rendement global des ignames Dioscorea rotundata lorsqu'elles sont cultivees en sol sablonneux a I'Quest du Nigeria. Lorsque la comparaison a...

El cubrimiento de almacigos de name redujo la temperatura del suelo y mejore la emergencia, el tiempo de emergencia rendimiento por cepa y rendimiento total de name, Dioscorea rotundata, en un suelo arenoso de Nigeria Occidental. La comparacion de camas con almacigos alomados 0 pianos demostr6 qu...


Hahn, S.K.Lal, R.[Effect of method of seed bed preparation, mulching and time of planting on yam (Dioscorea rotundata) in Western Nigeri. In C.L.A. Leakey (Eds.), Proceedings of the Third Symposium of the International Society for Tropical Root Crops (p. 293-306)]Effect of method of seed bed preparation, mulching and time of planting on yam (Dioscorea rotundata) in Western Nigeri. In C.L.A. Leakey (Eds.), Proceedings of the Third Symposium of the International Society for Tropical Root Crops (p. 293-306)

The constraint to the production of the root and tuber crops, cassava, yams and sweet potato in Nigeria and Africa were stated. Breeding methods most appropriate to these crops were discussed in terms of mating systems, creation of source populations, selection, and use of selections. Intervariet...


Hahn, S.K.Howland, A.K.Wilson, J.E.[Breeding of root and tuber crops]Breeding of root and tuber crops

Wild relatives of cassava (Manihot spp.) and yam (Dioscorea spp.) have many attributes of importance to the genetic improvement of the cultivated species. Some crosses between cassava and its wild relatives have led to poly ploids (crosses to M. />laziovii and M. epruinosa) and resistance to two ...


Asiedu, RobertBai, K.V.Terauchi, R.Dixon, Alfred G.O.Hahn, S.K.[Status of wide crosses in cassava and yam]Status of wide crosses in cassava and yam

The response of yam (Dioscorea) cultivars to artificial and natural infections with minisett rot pathogens was investigated. None of the 20 yam cultivars were resistant to Sclerotium rolfsii [Corticium rolfsii] or Trichoderma longibrachyatum. Cultivars TDa 84/093, 85/236, 85/257, TDr 608, 745, 81...


Osai, E.O.Ikotun, T.Asiedu, RobertHahn, S.K.[Susceptibility of yam cultivars to minisett rot pathogens]Susceptibility of yam cultivars to minisett rot pathogens
Autor: Hahn, S.K.

Diverses es peces d'ignames sont cultlvees da ns la "zone de civilisation de l'igname" en Afriq ue oeci dentale. Que ce soit au champ ou en entrepot, l'igname est exposee a des maladies provoquees par des virus, bacteries, champignons et nematodes. II est possible de lutter contre ces maladies gr...


Hahn, S.K.[Lutte contre les maladies de ligname: Guide de recherche de lIita, No. 39]Lutte contre les maladies de ligname: Guide de recherche de lIita, No. 39

Yam is an important food crop, especially in the ‘yam zone' of West Africa. Total world production is about 20-25 million ton per annum, some 70 per cent of it grown in Nigeria. Although regarded mainly as a source of carbohydrate, some species are nearly as rich in protein as rice or maize.


Hahn, S.K.Osiru, D.Otoo, J.Akoroda, M.O.[Production of yams: present role and future prospect]Production of yams: present role and future prospect

Selecciona los documentos para visualizarlos

Nombre del archivo Ver recurso