Show hillside crops records of crops will show that the trees grown on the hillsides hlll hill eldea sides or at tho top lot elevations have a greater percentage perc c ot of crop years than tho ooin ln the hollow this condition Is IB primarily duei due to the air drainage or to differ ence ol of temperature between the low ground and that a few feet higher up experiments have shown that on on still frosty nights there has been a differ ence of 16 15 degrees in as many feet between the bottom of a ravine or 01 hollow and aba top nearby |