Fig. 1.
Schematic diagram of the cropping sequences, over the two-year period, used in the experiments carried-out in a Mollisol and a Vertisol at Paraná, Argentina (31°51′ S; 60°32′ W). Black horizontal bars represent the periods with actively growing (green) crops, whereas grey horizontal bars represent fallow periods. S-S: soybean monoculture; S-M: soybean-maize; CC/S-M: wheat cover crop/soybean-maize; W/S-M: wheat/soybean-maize; CC/S-CC/S: wheat cover crop/soybean; W/S-W/S: wheat/soybean. In the abbreviation of cropping sequences, hyphens separate years, whereas slashes separate crops within the same year.