@article{amaral_spader_anghinoni_meurer_2000,  title={Resíduos vegetais na superfície do solo afetam a acidez do solo e a eficiência do herbicida flumetsulam},  volume={30},  ISSN={0103-8478},  url={https://doi.org/10.1590/S0103-84782000000500008},  DOI={10.1590/S0103-84782000000500008},  number={5},  journal={Ciência Rural},  publisher={Universidade Federal de Santa Maria},  author={Amaral, Antonio Sergio do and Spader, Vitor and Anghinoni, Ibanor and Meurer, Egon Jose},  year={2000},  month={Sep},  pages={789–794} }