of the total) for the winter and summer cover crops, respectively. Following a whole cycle of winter and summer cover
crops grown, the mean soil organic C (SOC) increased by 13.8 and 39.1% in the KGL and QFS soil, respectively,
compared to the respective soils before. The results suggest that triticale, ryegrass, and bellbean are the promising
winter cover crops in the QFS soil, while sunn hemp, velvetbean (Mucuna pruriens), and sorghum sudangrass (Sor-
ghum bicolor × S. bicolor) are recommended summer cover crops for both soils under favorable temperatures.