[Effect of traditional and reduced soil cultivation techniques on weed in cereals]

cereal crops cero-labranza clay soils conventional tillage cultivos de cereales danemark denmark dinamarca elymus repens labranza convencional loam soils malezas mauvaise herbe organic soils sandy soils soil types sol argileux sol organique sol sableux sol sablolimoneux suelo arcilloso suelo arenoso suelo franco tipos de suelos travail du sol conventionnel type de sol weeds zero tillage