Machado, Carlos Marcírio Naumann, Nilson Gilberto Fleck, and Rodrigo Saldanha de Souza. 2014. “Efficiency in Land Utilization, Yield and Yield Components of Crops in Association”. Pesquisa Agropecuaria Brasileira 22 (11/12):1167-83. https://doi.org/10.1590/S1678-3921.pab1987.v22.14666.