Current state of and outlook for the potato cultivar assortment from the point of view of large-scale production [Czechoslovakia]

agronomic characters biological control breeding breeding aims calidad checoslovaquia crops cultivar cultivars cultivos czechoslovakia economic plants europa europe hortalizas (plantas) lutte biologique objetivo de mejoramiento papa pest control methods plantas plantas feculentas plante plante de culture plante racine plants pomme de terre potatoes productividad productivity profitability quality rendement rendimiento rentabilidad resistance to injurious factors root crops root vegetables starch crops vegetable crops yields