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In the past few years, the economy of Vietnam has developed very rapidly, and in agriculture, food production has been quite successful, especially that of rice. At the same time cassava production has changed from being a crop providing food for humans to being a cash crop. The planting of new c...
The problem of fertilizer recommendations is discussed and each criterion to be considered is analyzed: amount of nutrients in the soil, crop requirements, fertilizer efficiency, and economic aspect of fertilization. A list of some var. tolerant to adverse soil conditions (low P, high Al) is pres...
Se discute el problema de la recomendacion de fertilizantes y se analizan cada uno de los criterios a considerarse: cantidad de nutrimentos que tiene el suelo, requerimientos del cultivo, eficiencia de los fertilizantes y aspecto economico de la fertilizacion. Se presentan una lista de algunas va...
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...
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...
Five soil types on which cassava is being planted were investigated. Almost all these soils are degraded in terms of soil properties, especially with respect to soil fertility. Cassava is traditionally planted without fertilizer application and soil conservation measures, resulting in a negative ...
En Costa Rica, el promedio del área sembrada de frijol en el período de 1986-96 fue de 55,765 ha., con una producción de 30,653 TM, para una productividad de 558.5 kg/ha y un consumo per cápita de 11.43 kg. Las dos principales zonas productoras son la Brunca (9,25" longitud O. 83,00" latitud N.) ...
Se detallan ensayos sobre tolerancia a la toxicidad del Al y a la baja disponibilidad de P; efectos morfologicos y fisiologicos de la toxicidad del Al; requerimientos nutricionales de especies forrajeras de gramineas y leguminosas; sintomas foliares visuales de problemas de origen mineral y sobre...
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