Perez, Kátia Sueli Sivek, Maria Lucrecia Gerosa Ramos, and Concepta McManus. 2005. “Microbial Biomass Nitrogen in Soil Cultivated With Soybean, under Different Management Systems, in the Cerrado”. Pesquisa Agropecuaria Brasileira 40 (2):137-44. https://doi.org/10.1590/S1678-3921.pab2005.v40.6934.