[Arachis pintoi as cover plant in the coffee crop : research results and experience with farmers in Nicaragua]

arachis pintoi biomasa biomass biomasse coffee costos costs cover plants crop yield desmodium ovalifolium escarda establecimiento de plantas estres fauna faune herbicidas herbicide herbicides nicaragua plant establishment plant production plantas de cobertura plante de couverture production data rendement des cultures rendimiento de cultivos root systems sistema radicular soil chemicophysical properties stress weed control