(1)
de Salvo Soares Novo, M. do C.; Tetsuo Tanaka, R.; Antonio Mascarenhas, H. A.; Vila Nova Alves Pereira, J. C.; Bortoletto, N.; Boller Gallo, P.; Teixeira Vargas, Álvaro A. The Influence of Nitrogen and Potassium on Plant Growth and on Yield of Soybeans Planted in Winter. PAB 1997, 32, 33-41.