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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 ...
Efecto de la fertilización nitrógeno-fosfatada sobre el crecimiento otoño-invernal y la absorción de fósforo en tepes de un pastizal natural.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
The effect of fertilization with triple superphosphate and ammonium sulfate on the botanical composition and thy matter production in pods of a pasture of naturalized species was studied during an autum-winter period. The ...
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 ...
Efecto de la inoculación de frijol en zonas de temporal en Durango [México].
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
Since 1978, bean inoculation in areas under water stress in the State of Durango have been observed. The project started with the isolation and selection of Rhizobiurn phaseoli strains from uninoculated bean plant nodules. ...
Tablas de volumen para Pinus caribaea var. hondurensis en la Reserva Forestal La Yeguada, Panamá.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
This work contains volume tables for Pinus caribaca vat. hondurensis located in La Yeguada Forestry Reserve, Panama The tables were calculated for total volume and lltirltir mii top diameters of 5 and 10 cm for trees with ...