Effect of increasing levels of nitrogen on profitability and risk of commercial production of three potato cultivars

Abstract

During 1980 and 1981 two field trials with five nitrogen levels (0, 40, 80, 120 and 160 kg/ha) in three potato cultivars (Achat, Aracy and Bintje) were conducted on a Dark-Red Latosol at the CNPH-EMBRAPA, Brasília, DF, Brazil. The experimental design was a 5 x 3 factorial in randomized complete blocks with four replications. The average marketable production was affected by nitrogen. Aracy cultivar yielded better than Achat and Bintje. Higher nitrogen levels increased the class-1 tubers of 'Achat' and 'Bintje' and decreased for 'Aracy'. As far as profit and risk are concerned, 120 kg/ha of nitrogen was the best level for all the potato cultivars.