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Weed control in Latin America is costly and heavily dependent upon herbicides. Often irrigated rice farmers spray herbicides in late post-emergence at 30 to 44 days after emergence (d.a.e.). The economic benefits from such late applications are often unclear. Two experimental approaches involving...


Fischer, Albert J.Ramírez Suárez, A.[Mixed weed infestations : prediction of crop losses for economic weed management in rice]Mixed weed infestations : prediction of crop losses for economic weed management in rice

Results of a study on bean cultivation in El Salvador are given. Aspects analyzed were as follows: consumption structure (apparent, per capita, and rural-urban; preferences, consumption and cooking ways, and nutritive value); area, production, and yields (at national and regional levels, by cropp...


Portillo de Villegas, MEGaona R, J[El frijol en El Salvador: implicaciones para la investigacion agricola]El frijol en El Salvador: implicaciones para la investigacion agricola

The trends and yield constraints in production systems of beans and cassava are analyzed; examples are given of the role of 3 types of information (macro stage, micro stage, and critical inference stage) in the design of research for beans and cassava at the Centro Internacional de Agricultura Tr...


Sanders, J.H.Lynam, John K.[Trends and yield constraints in the production systems of beans and cassava in Latin America with emphasis on research design implications]Trends and yield constraints in the production systems of beans and cassava in Latin America with emphasis on research design implications

Scobie, Grant M.Posada Torres, Rafael[El impacto en Latinoamérica de las variedades de arroz de altos rendimientos, con énfasis en el caso colombiano : resumen y resultados para discusión]El impacto en Latinoamérica de las variedades de arroz de altos rendimientos, con énfasis en el caso colombiano : resumen y resultados para discusión
Autor: Davis, J.H.C.

Three trials were carried out at CIAT-Palmira to quantify the effect of plot edges and useful plot size in beans. In the 1st trial (sown in Oct. 1977), the competition effect of 36 climbing bean var. associated with maize ICA H-210 in adjacent plots and the effect of the alleys on plot edges were...


Davis, J.H.C.[Metodologia de la investigacion aplicada a la asociacion frijol- maiz]Metodologia de la investigacion aplicada a la asociacion frijol- maiz

In order to determine optimum plot size, the method of max R(2) was used, for which 6 regression models were tested on the basis of the following selection criteria: the coefficient of determination, error mean square and the coefficient of variation. Optimum plot size was 7 m(2). To determine th...


Muñoz Flórez, Jaime EduardoSalazar, LCLópez, Y.[Determinacion del tamano, forma y numero de repeticiones mas adecuadas en ensayos de rendimiento en frijol (Phaseolus vulgaris L.) y comparacion de dos metodos para estimar su rendimiento comercial]Determinacion del tamano, forma y numero de repeticiones mas adecuadas en ensayos de rendimiento en frijol (Phaseolus vulgaris L.) y comparacion de dos metodos para estimar su rendimiento comercial

The effect of triple superphosphate (TSP), band-applied at depths of 5 and 25 cm, with 0, 66, and 131 kg P/ha, on the yield (14 percent MC) of bean var. Carioca, G 4000, and ICA-Pijao (efficient in P utilization), and Puebla 152 (inefficient) was studied at CIAT`s exptl. station in Quilichao, Col...


Thung, MOrtega, J.Rodríguez, R.[Respuesta al fosforo aplicado a dos profundidades y su efecto en el rendimiento del frijol (Phaseolus vulgaris L.)]Respuesta al fosforo aplicado a dos profundidades y su efecto en el rendimiento del frijol (Phaseolus vulgaris L.)

L.A. is the largest producer of field beans in the world (34 percent - av. of 3.85 million t/yr from 1968-71), Brazil alone accounting for more than 50 percent. Productivity is low, ranging from 330-1164 kg/ha (av 600 kg). Most of the beans are grown on small farms, often in association with othe...


Gutiérrez Palacios, U.Infante, MPinchinat, A[Situacion del cultivo de frijol en America Latina]Situacion del cultivo de frijol en America Latina

Different assays on climbing beans in relay cropping or associated with maize, N fixation and Rhizobium inoculation, and bush beans in monoculture are reported. These were conducted in La Selva, Antioquia (Colombia), through a collaborative project between the Instituto Colombiano Agropecuario (I...


Roman, ADavis, J.García, S.Graham, P.Temple, S[Informe de trabajos 1979: Convenio ICA-CIAT: Programa de frijol]Informe de trabajos 1979: Convenio ICA-CIAT: Programa de frijol

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