Farm land will heat up slower. Slopes facing the sun will heat up quicker than those facing away from the sun. The earth heats the air by conduction, convection and radiation. The resulting temperature differences lead to pressure differences. Pressure differences lead to air movement - wind.
Winds cause a redistribution of pressure leading to changes in the winds.
The air contains water vapour. Cooling is caused by the air being forced to rise by flowing over hills, by convection and by air streams converging. Cooling also can occur when the air is in contact with cold ground. As the air cools it is able to hold less water until eventually the water vapour starts to condense into droplets. This releases latent heat.