Nitrogen application, size of seed tubers and preheating of potatoes, 2: 4 cultivars for starch production [starch content]

absorption de substances nutritives amidon application rates azote carbohydrate content contenido de carbohidratos crop yield dimension dimensions dose d'application ensayos de variedades fertilisation fertilizer application heat treatment nitrate nitrates nitratos nitrogen nitrogen content nutrient uptake papa de siembra plant de pomme de terre rendement des cultures rendimiento de cultivos seed potatoes solanum tuberosum starch teneur en azote teneur en glucides traitement thermique tubercule tubers variedades varieties variety trials