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Doll, Jerry D.Leihner, D.E.Fuentes de Piedrahíta, Cilia L.[Guía de estudio para ser usada como complemento de la unidad audiotutorial sobre el mismo tema][Manejo y control de las malezas en el cultivo de la yuca]Manejo y control de las malezas en el cultivo de la yuca
Müller-Sämann, Karl M.Flörchinger, FGirón, LERestrepo, J.Leihner, D.E.[Soil conservation strategies that take into account farmer perspectives]Soil conservation strategies that take into account farmer perspectives
Doll, Jerry D.Piedrahíta Castañeda, WilsonLeihner, D.E.[Método de control de malezas en yuca (Manihot esculenta Crantz)]Método de control de malezas en yuca (Manihot esculenta Crantz)

Erosion trials under natural rainfall were conducted at two locations in the Andean hillsides of south-west Colombia on moderate slopes. Sediment-bound losses of seven cassava (Manihot esculenta) cropping systems per cropping period ranged from 26 to 1726 kg ha?1 for organic matter, 0.9 to 65.5 k...


Ruppenthal, MLeihner, D.E.Steinmuller, N.El-Sharkawy, Mabrouk A.[Losses of organic matter and nutrient by water erosion in cassava-based cropping systems]Losses of organic matter and nutrient by water erosion in cassava-based cropping systems
Autor: Leihner, D.E.

The management of cassava intercropping and its evaluation are described. Multiple cropping systems are defined: consecutive cropping and intercropping (mixed intercropping, row intercropping, strip intercropping, and relay intercropping). Basic biological and nutritional aspects of multiple crop...

Se presenta una descripcion del manejo de cultivos asociados con yuca y su evaluacion. Se definen lo que son los sistemas de cultivo multiple (cultivo consecutivo y cultivo intercalado o asociado-intercalado mixto, intercalado en surcos, intercalado en franjas, intercalado en relevo), se analizan...


Leihner, D.E.[Yuca en cultivos asociados: Manejo y evaluacion]Yuca en cultivos asociados: Manejo y evaluacion
Leihner, D.E.Doll, Jerry D.Fuentes de Piedrahíta, Cilia L.Fernández, F.O.[Study guide to be used as a supplement to the audiotutorial unit in the same topic][The biology and control of purple nutsedge (Cyperus rotundus L.)]The biology and control of purple nutsedge (Cyperus rotundus L.)

Field trials were carried out on a Dystric Nitosol at Calavi in the subhumid zone of southern Benin Republic, West Africa from 1989-1997. A split plot design with four replications was used. There were (our main plots: control (no hedgerow), Leucaena hedgerows, Acacia hedgerows and mixed Leucaena...


Akonde, T.P.Leihner, D.E.Kang, B.[Response of maize and cassava to potassium fertilization and alley cropping with Leucaena leucocephala and Acacia auriculiformis]Response of maize and cassava to potassium fertilization and alley cropping with Leucaena leucocephala and Acacia auriculiformis

Information on some diseases and pests that attack cassava, as well as the symptoms induced by nutritional deficiencies and toxicities and damage resulting from the misuse of herbicides are given in this manual. Specific and general recommendations regarding the control of the described problems ...

En este manual se presenta informacion sobre algunas de las enfermedades y plagas que atacan a la yuca, como tambien los sintomas inducidos por deficiencias y toxicidades nutricionales y danos debidos al uso incorrecto de los herbicidas. Se incluyen recomendaciones generales y especificas para el...


Lozano, J.C.Bellotti, Anthony C.Reyes, J.A.Howeler, Reinhardt H.Leihner, D.E.Doll, J.[Field problems in cassava]Field problems in cassava

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