Search
Now showing items 31-40 of 49
Incidencia de Azospirillum en algunas gramíneas del tropico subhúmedo cálido de México
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-01)
Number and identification of Azospirillum species were determined in the rhizosphere and roots of maize in 3 different biasses (l anicum maximum, Hyparremia tufa and Cynodon dactylon) collected in the field We observed ...
Helmintos parásitos de la ganadería de Jamaica
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-01)
The paper gives a list of helminths found in horses, cattle, goats and pigs in Jamaica. Reference was made to records of single multiple infections stemming from imported animals.
Anillos anuales de crecimiento en cafetos (Coffea arabica L.) y sus usos potenciales
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-01)
Annual growth rings are reported for coffee trees growing in the Coatepec region of Veracruz, Mexico. Ring structure and formation are briefly discussed and the potential use of growth rings in coffee are highlighted.
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 ...
Efecto de diferentes poblaciones de maíz (Zea mays) en la producción de raíces de yuca (Manihot esculenta) al cultivarlos en asocio, 2: aspectos económicos [cultivo múltiple].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
The economic efficiency and price sensitivity of cassava intercropped with maize in six different plant densities and two fertilization treatments were evaluated. This evaluation was part of an experiment done in hirrialba, ...
Determinación del período crítico de competencia de las malezas con el frijol (Phaseolus vulgaris L.) Muy Finca en el invierno [Lambayeque, Perú].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
Under the conditions of Lambayeque, Peru, a study to determine the critical period of competition of undergrowth weeds with the cultivation of beans (Phaseolus vulgaris) "Muy Finca" was carried out in the Experimental ...