désherbage (1) mauvaise herbe (1) espèce (1) saison (1) germination (1) champ (1) ferme (exploitation) (1) expérience scientifique (1) densité (1) Density (1) Counting (1) Environmental sciences (1) Seed technology (1) Year (1) Weeds--Control (1) Weeds (1) Species (1) Solanum nigrum (1) Polygonum (1) Germination (1) Galium (1) Earth (Planet) (1) Density (1) Counting (1) Chenopodium album (1) Bindweeds (1) Weed control (1) Flowering (1) exploitation agricole (1)