[Mechanized soil preparation followed by manual tree planting]

afforestation agricultural development analisis analyse analysis arbre arbre forestier boisement costos costs cultivation cultivo economic analysis economic plants escandinavia europa europe facteur de production forest trees forestry operations labour manejo del suelo mechanization methode methods mise en valeur du sol noruega norway operaciones forestales plantas plante plants pratique culturale production factors scandinavia scandinavie soil management trabajo travail trees