Silva, Paulo Claudeir Gomes da, Jose Salvador Simoneti Foloni, Luciana Boulhosa Fabris, and Carlos Sergio Tirirtan. 2010. “Biomass and C N Ratio in Intercrops of Sorghum and Maize With Cover Crops”. Pesquisa Agropecuaria Brasileira 44 (11):1504-12. https://doi.org/10.1590/S1678-3921.pab2009.v44.2989.