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Sieverding, ELeihner, D.E.[Influence of crop rotation and intercropping of cassava with legumes on VA mycorrhizal symbiosis of cassava]Influence of crop rotation and intercropping of cassava with legumes on VA mycorrhizal symbiosis of cassava

Recent information on the biological balance between purple nutsedge (Cyperus rotundus) and cassava is analyzed; the possibilities of influencing this balance to favor cassava are also studied. The slow initial growth of cassava highly favors the development and propagation of C. rotundus, result...


Leihner, D.E.Holguin V., J.López M., J.[El coquito (Cyperus rotundus L.) en el cultivo de yuca: Interacciones y control]El coquito (Cyperus rotundus L.) en el cultivo de yuca: Interacciones y control

The rainfall erosivity (R) and soil erodibility (K) factors of the Universal Soil Loss Equation (USLE) were determined on two sites in the Colombian Cauca Department over a five year period when rainfall was mostly lower than average. The results showed that the high erosion potential of the soil...


Ruppenthal, MLeihner, D.E.Hilger, THCastillo Franco, JA[Rainfall erosivity and erodibility of inceptisols in the Southwest Colombian Andes]Rainfall erosivity and erodibility of inceptisols in the Southwest Colombian Andes

Soil erosion and the productivity of cassava (Manihot esculenta Crantz) cropping systems, including forage legume intercropping, were monitored under natural rainfall conditions on Inceptisols in southwest Colombia. Trials were conducted over two cropping periods on moderate slopes. The best eros...


Leihner, D.E.Ruppenthal, MHilger, THCastillo Franco, JA[Soil conservation effectiveness and crop productivity of forage legume intercropping, contour grass barriers and contour ridging in cassava on Andean hillsides]Soil conservation effectiveness and crop productivity of forage legume intercropping, contour grass barriers and contour ridging in cassava on Andean hillsides

The type and magnitude of losses in cassava caused by Cyperus rotundus were determined. Two field expt. were conducted at Instituto Colombiano Agropecuario-Caribia exptl. station, Magdalena (Colombia) at 35 m.a.s.l. The location has an annual mean temp. of 280 degrees Celsius, mean annual precipi...


Leihner, D.E.López M., J.[Perdidas en el rendimiento y la calidad de la yuca (Manihot esculenta Crantz) causadas por coquito (Cyperus rotundus L.)]Perdidas en el rendimiento y la calidad de la yuca (Manihot esculenta Crantz) causadas por coquito (Cyperus rotundus L.)

In view of the lack of information on the use of herbicides in polycultures including non-commercial crop species, 2 expt. were designed to identify herbicides and doses suitable for crop associations including cassava. A total of 6 products were tested single or in mixtures having been chosen fo...


López M., J.Leihner, D.E.[Control quimico de malezas en policultivos con yuca (Manihot esculenta Crantz)]Control quimico de malezas en policultivos con yuca (Manihot esculenta Crantz)

The effects of cutting storage on cassava root and branch production as well as on other crop characteristics (wt. loss, percentage of viable cuttings, sprouting 80 days after planting, final stand, no. of seed- cuttings/plant) were studied under field conditions in the banana growing zone of San...


Luna R., J.M.Correa, H.Leihner, D.E.[Influencia do armazenamento de manivas de mandioca (Manihot esculenta Crantz) na producao de raizes e ramas]Influencia do armazenamento de manivas de mandioca (Manihot esculenta Crantz) na producao de raizes e ramas

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

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