Weed infestation in winter cereals as a result of intensive cropping system

agriculture intensive cereal crops cultivos de cereales cultivos de invierno culture d'hiver dominant species especies especies dominantes field experimentation grain granos infestation intensive farming malezas mauvaise herbe poland pologne polonia rendement rendimiento soil texture soil types species textura del suelo texture du sol tipos de suelos type de sol variedades varieties weeds winter crops yields