Buscar
Mostrando ítems 21-24 de 24
Descripción de instares y observaciones sobre la biología del gusano verde del repollo, Pieris aripa Boisduval [Brassica oleracea].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The importance of crucifers and their pests is given, with emphasis on the lepidopterous pests found in Venezuela Ascia monuste L , Plutella xilostella L and Pieris aripa Boisduval. Descriptions of the different stages ...
Contribución al estudio del fósforo en suelos ácidos. 1: Características de adsorción y fracciones de fósforo en una tierra parda del noroeste de España.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
P adsorption isotherm and P fractions were used to study the P adsorption characteristics of an acid brown soil from Galicia (North West of Spain). Adsorption data were adjusted to Freundlich, Langmuir, and Gunary equations, ...
Regulación química de la floración y fructificación en ajonjolí (Sesamum indicum L.).
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
The object of this research was to increase the harvested seed in sesame (Sesamum indicum L.). Microscopical observations showed that seeds mature far before the capsules open so it is possible to fasten plant maturity ...
Características químicas de las semillas de tarhui (Lupinus mutabilis) cosechadas en Cuzco, Perú.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1981-07)
Tarhui (Lupinus rnutabilis) is a legume native to the Highlands (2 500 — 4 500 m above sea level) of Peru, with appreciable resistance to frost, drought and poor soils. Results obtained in this work confirms that tarhui ...