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The factors influencing the size and shape of exptl. field plots (area of exptl. lot, soil types, trial objective, no. of replicates, and degree of accuracy and homogeneity of the exptl. material) for the execution of field expt. are discussed. The basic principles of the following different meth...

Se discuten los factores (area de lote exptl., tipo de suelo, objetivo del ensayo, no. de repeticiones y grado de precision y homogeneidad del material exptl.) que influyen en el tamano y la forma de la parcela en la conduccion de expt. de campo. Se describen brevemente los principios basicos de ...

Nutritional studies of cassava have shown that in high-P acid laterite soils, there was no response to P application during four years of consecutive cropping. In low-P soil, even though cassava initially responded to 100 kg P2O5/ha, the response gradually declined. The optimum economic dose of P...

Annual growth of cassava production in the main cassava production areas during the last five years seems to have kept pace with the increase in population, while the harvested area of cassava increased only 0.6% annually. Of the total cassava produced, about 54% is used for human food, 28% for i...

In recent years the National Root and Tuber Crops Program of Vietnam, with the cooperation and assistance of the Centro International de Agricultura Tropical (CI AT), has drawn up a plan for strengthening the research and development capacity, with the objective of improving cassava production in...

During the last three years cassava production in the Philippines did not progress markedly, neither in area nor in volume. In terms of area, there was only an increase of 14,424 ha or 6.4%, while in terms of volume the increase was 112,177 metric tons or 5.7%. One of the reasons for this was the...

Production trends and the demand for foods are taken as a useful framework to analyze cassava potential, production, marketing, and utilization in Latin. America. It is shown that to enhance the importance of cassava, it is not only necessary to improve production technology but to also carefully...

Se toman como marco de referencia las tendencias de produccion y demanda de alimentos, para analizar el potencial de la yuca, su produccion, mercadeo y utilizacion en America Latina. Se plantea que para incrementar la importancia del cultivo, no solo es necesario mejorar la tecnologia de producci...

Several cassava trials were planted at CIAT to study the effect of the maturity of stem cuttings, depth of planting, cutting length, planting position and the angle of the cut on root yield. Cuttings from the top and middle part of vigorous 1-yr-old plants produced greater than root yields than t...

Se sembraron varios ensayos de yuca en el CIAT para estudiar el efecto de la madurez de las estacas, profundidad de siembra, longitud de la estaca, posicion de siembra y angulo de corte de la misma, en el rendimiento de las raices. Las estacas de la parte media y superior de plantas vigorosas de ...

The results of regional trials for promising cassava var. under uniform improved technology are given. Trials were conducted in Media Luna, Chigorodo, Carimagua, Rio Negro, San Martin, CIAT- Palmira, CIAT-Quilichao, and Caicedonia. In 7 of the 8 sites, var. M COL 1684, CM 342-55, and CM 489-1 out...

Se presentan los resultados de las pruebas regionales para obtener var. promisorias de yuca con tecnologia uniforme mejorada. Se realizaron evaluaciones en Media Luna, Chigorodo, Carimagua, Rio Negro, San Martin, CIAT-Palmira, CIAT-Quilichao y Caicedonia. En 7 de los 8 sitios evaluados, las var. ...

A process for the production of SCP was developed and tested under lab conditions at the U. of Guelph. The microorganism used is the fungus Aspergillus fumigatus I-21A, a mutant that does not produce spores and can grow under very selective conditions at a temp of 45 degrees Celsius and a pH of 3...

Se desarrollo y ensayo a nivel de laboratorio en la U. de Guelph un proceso para la produccion de proteina unicelular. El microorganismo utilizado fue el hongo Aspergillus fumigatus I-21A, un mutante que no produce esporas y puede crecer bajo condiciones muy selectivas a una temp. de 45 grados ce...