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Now showing items 661-670 of 676
Efecto del blasticidin en el control del virus del mosaico del tabaco
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
The inhibiting effect of Blasticidin on Tobacco Mosaic Virus (TMV) was studied Doses of 10, 1, 0.1 and 0.01 ppm were used to estimate the amount of product useful to determine inhibition of the virus. The product was applied ...
Tablas de volumen para Eucalyptus camaldulensis en Nicaragua
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Overbark and underbark double-entry tables for total volume are presented for trees of Eucalyptus camaldulensis in Nicaragua as well as tables to a minimum top diameter of 5 em. Data were collected from a total of 61 trees ...
Aluminio activo en suelos derivados de cenizas volcánicas de Costa Rica y Guatemala
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Active aluminum extracted with 0.2 M ammonium oxalate, pH 30, and 4 M KOH of 51 samples of Andepts of Costa Rica and Guatemala was quantified and compared. Acid-oxalate extractable alumimum varied from 0.02 to 5.45 while ...
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 ...