This article describes an increase in rainfall and cooler temperatures related to a decrease in summer fallow.
https://massivesci.com/articles/farms-climate-change-crop-rotation-rain-fallow/
As Walter Jehne has emphasized, the water cycle controls the vast majority of the earth's heat balance, and plant transpiration and the soil carbon sponge have a great deal to do with the weather.
Soil Carbon Coalition is a 501(c)3 nonprofit organization