Adaptability and stability of the zinc density in cowpea genotypes through GGE-Biplot method - Oliveira, Diêgo Sávio Vasconcelos de; Franco, Luis José Duarte; Menezes-Júnior, José Ângelo Nogueira de; Damasceno-Silva, Kaesel Jackson; de Moura Rocha, Maurisrael; Cabral das Neves, Adão; Sousa, Francisco Mauro de (Centro de Ciências Agrárias - Universidade Federal do Ceará, 2017)