Table and seed potato production in the highlands of Northern Thailand

agentes nocivos agricultural chemicals agronomic characters altiplanos asia asie crops cultivation cultivo cultivos desarrollo estacional economic plants espacement espaciamiento facteur nuisible herbicidas herbicide herbicides hortalizas (plantas) injurious factors methode methods organisme nuisible papa pests physiographic features plagas plantas plantas feculentas plante plante de culture plante racine plants pomme de terre potatoes pratique culturale produit agrochimique root crops root vegetables seasonal development spacing starch crops tailandia taxa taxon taxonomia taxonomie taxonomy thailand variedades varieties vegetable crops