“…Millet ( Pennisetum glaucum ) is one of the most used grasses in the Brazilian Cerrado (Ferreira Junior et al., ) because of its high straw yield (Pacheco et al., , ; Silva Filho, Borin, & Ferreira, ), with an average of 10 t ha −1 (Wutke, Calegari, & Wildner, ), and its high C/N ratio. These attributes promote greater soil protection (Silva Filho et al., ) and increased nutrient cycling (Pacheco et al., , ), even under water deficit conditions (Pacheco et al., ). The pigeonpea ( Cajanus cajan ), a legume, is adapted to the Cerrado and has a high straw yield (Silva Filho et al., ) of 5–18 t ha −1 (Wutke et al., ) because it tolerates high temperatures and water deficits; in addition, pigeonpea cultivation also increases the amount of N in the soil, between 41–280 kg ha −1 yr −1 (Wutke et al., ), through biological fixation (Silva Filho et al., ).…”