I'm just explaining the logic behind why it happens, I don't live in that region anymore, and am not in agribusiness. Farmers are the min-maxers of the blue col

I'm just explaining the logic behind why it happens, I don't live in that region anymore, and am not in agribusiness. Farmers are the min-maxers of the blue collar trades. Your source actually outlines the process I just described in the summation at the end. "In summary, the soil temperature increases that occurred with burning were higher in sand soil than in muck, and this effect dampened with soil depth. Transient (short-lived) soil temperature increases that occurred during the field burning events were smaller than the naturally occurring diurnal soil temperature swings that occurred throughout the growing season. This observation indicates that burn events likely have minimal impacts on soil microflora and microfauna. Young shoots emerging through the green cane harvest trash blanket during winter months will encounter colder air temperatures. This consistent microclimate effect will either delay growth or, in some cases, lead to frost damage, which translates to a loss in seasonal yield potential. Crop canopy damage by frost is more likely to occur with green cane harvest than with traditional burnt cane harvest. Therefore, switching from traditional burnt cane harvest to green cane harvest may have trade-off value for the growers. In the long term, green cane harvest may add organic matter in the soil (important in sand) and reduce soil loss (important in muck). However, there may be some short-term yield losses through delayed growth and frost damage in young plants. The proper management of the excessive trash may reduce the negative effects of trash blanket on sugarcane growth and yield. The ongoing research on trash management includes the evaluation of trash incorporation into the soil through disking, through raking of trash from the row and leaving it in the inter-row space, and through partial removing of trash from the field." emphasis is mine.