Fig. 1. Storage root yield of local control (check) clones and another nine clones of sweetpotato used for analysis of genotype x environment interactions across 14 environments: OXA = Oxapampa, SRA = San Ramon, AQP = Arequipa, LMO = La Molina, TIM = Tingo Maria, TAC = Tacna, HCO = Huanuco. Nitrogen fertilization: N0 = 0 and N80 = 80 kg ha^–1.