A. S. Nascente, C. A. C. Crusciol, and T. Cobucci, “Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time”, PAB, vol. 47, no. 12, pp. 1699–1706, Jan. 2013, doi: 10.1590/S1678-3921.pab2012.v47.12532.