FIGURE CAPTIONS
Fig.1 Geographic locations of the sites included in this study (Site 1=Itirapina/SP; Site 2=Quatá/SP; Site 3=Quatá/SP; Site 4=Quatá/SP; Site 5=Valparaíso/SP; Site 6=Quirinópolis/GO; Site 7=Capivari/SP; Site 8=Quirinópolis/GO; Site 9=Iracemápolis/SP; Site 10=Chapadão do Céu/GO). Sugarcane cultivation areas were processed according to the updated data from the Canasat’s project (www.dsr.inpe.br/laf/canasat/)
Fig. 2 Annual SOC rates to a 30-cm depth in relation to the baseline (A) and NR treatment (B) in sandy and clayey soils. Asterisk (*) symbol indicates significant difference between the straw removal treatment and baseline (before treatments setup) by Dunnett test (p<0.05) for each soil depth. (⸹) symbol indicates significant difference between the straw removal treatment and NR treatment by Tukey test (p < 0.05).
Fig. 3 Relationship between cumulative straw inputs and SOC stocks (0-30 cm depth) in the sandy and clayey soils. p ≤ 0.05 indicates linear regression is significant; ns = not significant. (b) indicates kg of C in the soil per Mg of straw per hectare.