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Agricultural research in developing countries has lacked relevance to farm-level production problems, especially appropriate technologies for small-scale or limited-resource farmers. Currently research institutions are directing their efforts towards these objectives. This paper is a preliminary ...

The distribution of cassava among different climate and soil types in South America, based on the adopted hierachical classification of soil and climate conditions for cassava, is briefly discussed. Both soil and climate components of the classification have been used to produce a map of environm...

Two trials were conducted at the CIAT expt station in Cali, Colombia, to measure the effect of spatial arrangement at fixed planting densities on cassava root yield. In expt I, 3 cassava cv. of different growth habit were planted at 10,000 plants/ha and arranged in 5 different patterns. Experimen...

A preliminary description is made of the 6 zones of the Peruvian jungle that could possibly be suitable for cassava production and application of drying technology. They are as follows: zone A, the valleys of the rivers Chinchipe, Ulcabamba, and Upper Maranon; zone B, the valley of the Huallaga r...

Methods of isolation and culture of cassava and Stylosanthes protoplasts are described. The application of these methods requires the routine regeneration of plants from isolated protoplasts. In cassava, protoplast isolation from leaves and shoot tips of plants cultured in vitro and from somatic ...

CIAT`s contribution to this joint research program was (1) to develop a technique for the production of bacteria-free planting stocks of cassava and (2) to study the effect of physical therapeutic agents on vegetative material used for propagation. The propagation technique developed to produce C...

The most important bacterial disease of cassava is cassava bacterial blight (CBB). This disease was first recorded in Brazil but was later reported in Colombia and observed in several other countries in South America and Africa. Symptoms of this disease are leaf spotting, wilting, dieback and gum...

The different operations involved in the cassava drying process to produce chips for animal feed are indicated, namely weighing the fresh cassava, chipping, spreading out of chips, turning over of chips, recollection, storage, and marketing. The organization and management of a natural cassava dr...

Based on the considerations related to the characteristics of cassava, centers of origin, and the traditional system of cultivation, several conclusions were made regarding the relationships between the plant and NPFs, constituted by disease and pest pressures and edaphic and climatic factors. It...

Background information is given on a cassava seed production project to be carried out on the northern coast of Colombia to improve crop productivity in the region through the use of improved planting material. The proposed methodology includes a survey to determine seed quality problems and geog...