. Dry-farming; . Fig. 25. Corn roots. arid regions, roots will ordinarily go to a much greater depth than in humid regions. It is further to be remembered that roots are in constant search of food and water and are hkely to develop in the directions where there is the greatest abundance of these materials. Under systems of dry-farming the soil water is stored more or less uniformly to considerable depths — ten feet or more — and in most cases the percentage of moisture in

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