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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...


Nguyen, Huu HyNguyen, The DangPham, Van Bien[Cassava agronomy research and adoption of improved practices in Vietnam]Cassava agronomy research and adoption of improved practices in Vietnam

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...


Flor Montoya, Carlos A.[Revision de algunos criterios sobre la recomendacion de fertilizantes en frijol]Revision de algunos criterios sobre la recomendacion de fertilizantes en frijol

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...


Mohankumar, C.R.Potty, V.P.Ravindran, C.S.Kabeerathumma, S.Sudharmai Devi, C.R.[Progress in agronomy research in India]Progress in agronomy research in India

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...


Nguyen Huu HyPham, Van BienNguyen The DangThai Phien[Recent progress in cassava agronomy research in Vietnam]Recent progress in cassava agronomy research in Vietnam

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 ...


Thai PhienNguyen Cong Vinh[Nutrient management for cassava-based cropping systems in Northern Vietnam]Nutrient management for cassava-based cropping systems in Northern Vietnam

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.) ...


Araya Villalobos, Rodolfo[Sistema nacional de investigación de frijol en Costa Rica: Logros, dificultades y futuro]Sistema nacional de investigación de frijol en Costa Rica: Logros, dificultades y futuro

Humphreys, L.R.Ivory, D.A.Chee, Wong ChoiTopark-Ngarm, A.[Experiencia regional con Centrosema:Asia tropical y Región del Pacífico]Experiencia regional con Centrosema:Asia tropical y Región del Pacífico

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...


International Center for Tropical Agriculture[Soil Fertility and plant nutrition]Soil Fertility and plant nutrition

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