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Betancour, CAPardo, Juan ManuelTruke, Maria JoséMuñoz Flórez, Jaime EduardoÁlvarez, Elizabeth[In vitro isolation of a phytoplasma associated with frogskin disease of cassava (Manihot esculenta Crantz)]In vitro isolation of a phytoplasma associated with frogskin disease of cassava (Manihot esculenta Crantz)
Beebe, Stephen E.Rao, Idupulapati M.Terán Santofimio, HenryCajiao V., César Hernando[Breeding concepts and approaches infood legumes : The example of common bean]Breeding concepts and approaches infood legumes : The example of common bean

Data are given of area planted to beans, production, and yields in the Andean countries during 1964-66, 1974-76, and 1978; production, trade, and consumption during 1963-65 and 1973-75; and production, area, and yield growth rates during 1966-76. Constraints for bean productivity, cropping system...


Voysest Voysest, Oswaldo[Potencial agricola del frijol (Phaseolus vulgaris L.) en los paises andinos]Potencial agricola del frijol (Phaseolus vulgaris L.) en los paises andinos

Yield trials with farmers and acceptance surveys were conducted in Colombia in 1969-1970 to assess the potential use of opaque-2 maize in the tropical regons of the country. Yields were variable, particularly from one farm to another. In spite of this variability which may have confused the resul...


Francis, C.A.Álvarez Luna, E.Sarria Villano, DPinstrup-Andersen, PerPradilla, A.[Yields and acceptability of opaque-2 maize in the tropics of Colombia]Yields and acceptability of opaque-2 maize in the tropics of Colombia

Productivity decline occurs in many agronomic systems due to loss of soil organic matter and a consequent decline in soil fertility. This is pronounced in light textured soils, which even in their pristine state can have low levels of fertility. High temperatures and leaching conditions in tropic...


Berthelsen, S.Noble, A.D.Ruaysoongnern, SawaengWebb, M.Hengfu, H.Jiexiang, Y.[Addition of clay based soil ameliorants to light textured soils to reduce nutrient loss and increase crop productivity]Addition of clay based soil ameliorants to light textured soils to reduce nutrient loss and increase crop productivity
Lépiz Ildefonso, Rogelio[Futuro de los pequeños productores de frijol en México y su relación con la agricultura comercial]Futuro de los pequeños productores de frijol en México y su relación con la agricultura comercial

Slaughter data from 304 Menz and 153 Horro ram lambs were analyzed to determine between breed differences in yields of carcass and edible non-carcass components. Average age at slaughter was 515 days. Total edible non-carcass component yield (ENCC) was obtained as the sum of weights of blood, lun...


Ermias, E.Rege, J.E.O.Anindo, D.O.Amare, H.Yami, A.[Carcass and edible non-carcass component yields in Menz and Horro ram lambs]Carcass and edible non-carcass component yields in Menz and Horro ram lambs
Martínez Racines, César PompilioSanint, Luis RobertoWeber, G.K.[Producción de arroz en Centroamérica: su localización, limitantes y principales variedades]Producción de arroz en Centroamérica: su localización, limitantes y principales variedades

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