My wife and I claimed a hillside for our 'Victory Garden.' We hired someone to burn stumps from trees that were removed over the past two years. He tore out roots, vines, wild blackberries, green brier and saw brier. He took out over two pickup loads of rocks. The top soil was rich, but only about five inches deep and after he tilled into the clay layer below, the soil was less than desired! I had him amended the sixty-ft. rows with one 40 Lb. bags of cotton burr compost and the same amount of cow manure. And thats all it took to get a bumper crop of everything that we planted! The soil where each of this years rows was located is soft and fraible. so next spring we will have the same amendments placed between this years rows and have the whole garden tilled. By next spring we will have around 30 cubic feet of homemade compost mixed with chicken litter. This mixture will be used to top dress our crops. Rows treated in this manner will retain twice the moisture than un-amended soil. If you try this, you won't be sorry.