Use of plants grown in polythene bags [Hevea, Sri Lanka]

asia asie building materials containers contenedores conteneur crops cultivation cultivo cultivos dicotiledoneas dicotyledons economic plants euphorbiaceae geraniales hevea hevea brasiliensis industrial crops methode methods multiplication des plantes plant containers plant propagation plantas plantas industriales plantation plante plante de culture plante industrielle planting plants plastics pratique culturale rubber crops sri lanka