Recherche
Voici les éléments 681-690 de 690
Efecto de diferentes poblaciones de maíz (Zea mays) en la producción de raíces de yuca (Manihot esculenta) al cultivarlos en asocio. I. Aspectos agronómicos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-04)
Maize (cv Tit-weft PB-C7) was intercropped with cassava (cv. Valencia) to assess the effect of different maize populations on cassava root yield with two levels of fertilization.
The experiment was conducted at Turrialba ...
Propagación vegetativa in vitro de pejibaye (Bactris gasipaes H.B.K.)
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-04)
Clonal propagation of pejibaye palm (Bactris gasipaes H. B. K.) was obtained by calhis culturing from shoot apices of young filed-grown plantlets on a modified Murashige and Skoog medium. Callus was induced from cultured ...
Relaciones fósforo-zinc en tres suelos ácidos de Costa Rica, 2: absorción de los elementos por tomate [Lycopersicon esculentum] en el invernadero.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
In a greenhouse experiment with tomato as indicator plant and using three acid, low Zn soils from Costa Rica the effects were studied of four P levels (zero, sufficient to supply 36 ug/ml of available P, twice and four ...
Disponibilidad y contenido de cobre, zinc and magnesio en un ultisol y un inceptisol bajo diferentes niveles de manejo.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
Two acid soils (an Ultisol and an Inceptisol), both of which were subjected to intensive or extensive cultivation prior to the experiment, were limed at different levels (exchangeable Al times 0, I.5, or 3) and treated ...
Relaciones fósforo-zinc en tres suelos ácidos de Costa Rica, 1: comportamiento en el suelo.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
The effects of high P and Zn applications and their interactions were studied in three acid (pH 5 .3-5.9 ) soils of Costa Rica. It was observed that as all three soils fixed P strongly, the obtained available P levels, ...
Una poliedrosis de Spodoptera frugiperda en Venezuela [Zea mays].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
A nuclear polvhedrosis virus (x polyhedra = 1.60 x 1.50 p) with multiple enveloped nucleocapsids was found infecting Spodoptera frugiperda larvae collected in corn (Zea mays) plants in Venezuela. A dosis of 6 106 polyhedra ...
Métodos de multiplicación del babaco (Carica pentagona L.) por injertos
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-04)
"Babaco" (Carica pentagona L.) is a parthenocarpic species and it is multiplied mainly by cuttings. Successful trials of two types of graftings on young seedlings of "chamburo" (Carica puboscens L) are reported. The more ...
Recuperación de larvas de Meloidogyne incognita de tres suelos tropicales por modificaciones de las técnicas del Embudo de Baermann modificado y centrifugación-flotación.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-01)
The comparative efficiency of the centrifigation-flotation (CF) and modified Baermann Funnel (MBF) techniques, as well as some modifications, for the extraction of Meloidogyne incognita larvae from three soil types commonly ...
Evaluación de nematicidas para el combate de Meloidogyne incognita en dos cultivares de Apium graveolens.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-01)
The effects of aldicarb, carbofitran, ethoprop, phenantiphos and fensulfothion, at rates of 4, 5, 7, 5 and 4 kg al lha, respectively, on the yield and other characteristics of celery, cv. 5204 and Dwarf, were evaluated on ...
Dothistroma en Costa Rica [Pinus caribaea var. hondurensis].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-01)
A foliage pathogen, Dothistroma septosporum, has been isolated from Pinus caribaea var. hondurensis, a species which has adapted well to Costa Rica environmental conditions and is an important element of the national ...