[Machinery report, 7: Planting machines for field plantation: testing planting quality, technical standard and the ergonomics for the planting workers]

ciencias forestales conception condiciones de trabajo condition de travail control de calidad danemark denmark design dinamarca equipment performance equipment testing ergonomic factors facteur ergonomique forest plantations forest workers foresterie forestry obreros forestales ouvrier forestier planting equipment rendimiento de la maquinaria technical properties working conditions