Weed occurrence in winter wheat with different soil cultivation

agentes nocivos cereales cereals cero-labranza control de malezas control de plagas cropping patterns crops cultivation cultivo cultivos cultivos de grano economic plants facteur nuisible grain crops injurious factors labranza lutte anti-mauvaise herbe malezas mauvaise herbe methode methods mode de culture pest control plantas plante plante de culture plants pratique culturale rotational cropping seedbed preparation tillage travail du sol trigo trigo de invierno weed control weeds wheats winter wheat