The authors of this paper note in the conclusion: "Over the winter growing period a reduction in wind speed early in the season was still experienced in the stripper front system compared to the draper front system and there also tended to be a slight decrease in air and soil temperature. While both treatments contained similar amounts of stubble, the straw in the stripper front treatment tended to be longer resulting in an increased thickness of residue cover and a resultant greater insulating effect. The reduction in temperatures recorded was not enough to result in any differences in the growth of the vetch crop. While the increased thickness of the stubble cover may prevent radiant heat from the sun from warming the soil it could also slow heat loss in colder periods as shown by the increase in minimum daily air temperatures on the soil surface (under the stubble layer)." Please access the full paper via the link below if this research interests you