An experiment was carried out in the upland region of Rio de Janeiro State, Brazil, to evaluate different planting systems on yam performance under organic management. A randomized blocks design was used with four replications, in a 2 x 2 factorial scheme comprising the treatments: soil tillage system (no-tillage or conventional) and cropping system (monoculture or intercropping with Crotalaria juncea). Intercropping with C. juncea (sun hemp) stimulated yam vegetative growth and reduced leaf blight caused by sun radiation. The weed population was reduced more effectively associating no-tillage and intercropping with sun hemp. None of the treatments affected yam yield, which was considered satisfactory indicating the potential of the organic management adopted.
Colocasia esculenta; black oat; green manuring; agroecology
