Influence of various crop species grown on rotational set-aside land on weeds in subsequent sugar beet

azote beta vulgaris cobertura verde cultivo secuencial fertilisation fertilizer application flora flore herbicidas herbicide herbicides labranza live mulches malezas mauvaise herbe mulch vivant nitrogen remolacha azucarera rotation culturale rotational cropping sequential cropping sugar beet tillage travail du sol weeds