Production systems in polycropping of cassava, maize and cowpea for the microregion of Bragatina-Para [Cultural practice; Manihot esculenta; Zea mays; Vigna unguiculata; Brazil

• Published in: Circular Tecnica - Centro de Pesquisa Agropecuaria do Tropico Umido (Brazil) no. 4
• Main Authors: Andrade, E.B. de, Frazao, D.A.C
• Format: Publication
• Language: Portuguese
• Published: Belem, PA (Brazil) 1980