The book The Management of the Soil was written by author Caroline Ruth Jackson Here you can read free online of The Management of the Soil book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Management of the Soil a good or bad book?
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Conditions Necessary. In many places water is not available for irrigation. A hard impervious stratum between the first and the fifth foot in depth prevents the storage of moisture and the development of deep root- 38 THE MANAGEMENT OF THE SOIL systems, while a porous stratum of coarse gravel near the surface allows the water to percolate beyond the root zone, and thus some of it is wasted. Though wasteful of water, the porous stratum insures drainage and is to be preferred to the impervious st...ratum. An examination of samples of soil obtained at different depths by a soil auger (Fig. 27) will aid in determin- ing the character of the subsoil. The character and depth of the soil should be considered. Most of the soil in mountain valleys is extremely deep — sometimes a uniform depth of thirty to forty feet is found. Sandy loams take irrigation well, but clay absorbs water slowly. It cannot be culti- vated when wet, and bakes and cracks open when it dries. A uniform slope of ten to twenty feet to a mile and an even surface are desirable con- ditions.
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