@article{oliveira_veiga_conagin_santos_abramides_1972,  title={Ensaio de rotação bienal de culturas},  volume={31},  ISSN={0006-8705},  url={https://doi.org/10.1590/S0006-87051972000100041},  DOI={10.1590/S0006-87051972000100041},  number={unico},  journal={Bragantia},  publisher={Instituto Agronômico de Campinas},  author={Oliveira, V. G. and Veiga, Ary de Arruda and Conagin, A. and Santos, S. Ribeiro dos and Abramides, E.},  year={1972},  pages={XLIX–LVII} }