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<br />. <br /> <br />TABLE OF CONTENTS (Continued) <br /> <br />Page <br /> <br />CHAPTER III. <br /> <br />NEEDS <br /> <br />24 <br /> <br />A. Agricultural Water Requirements <br /> <br />24 <br /> <br />I. Water Quantity Need <br />2. Water Quality Need <br /> <br />24 <br />25 <br /> <br />a. Salinity Tolerance of Crops <br />b. Crop Yields <br />c. Water Requirements for Leaching. <br />d. Fertilizer and Drainage Costs. <br />e. Soil Conditions <br /> <br />27 <br />27 <br />27 <br />,- <br />-i <br />,- <br />-i <br /> <br />B. Commitments to the Republic of Mexico <br /> <br />28 <br /> <br />CHAPTER IV.WELLTON-MOHAWK DIVISION LANDS <br /> <br />30 <br /> <br />A. Topography <br />B. Soils <br /> <br />30 <br />31 <br /> <br />. <br /> <br />I. <br />, <br /> <br />Valley Soils <br />Mesa Soils <br /> <br />31 <br />31 <br /> <br />C. Land Classification and Productivity <br /> <br />l' <br />-- <br /> <br />I. <br /> <br />Land Classification <br />Land Classification <br /> <br />1941 <br />1947 <br /> <br />33 <br />33 <br /> <br />, <br /> <br />a. Standards and Specifications. <br />b. Arable Land Classes and Subclasses <br /> <br />35 <br />35 <br /> <br />(I) <br />(2) <br />(3) <br />(4) <br />(5) <br /> <br />Class <br />Class ' <br />Class 3 <br />Class 4 <br />Class Ii <br /> <br />Lands. <br />Lands. <br />Lands. <br />Lands. <br />La nds . <br /> <br />37 <br />37 <br />38 <br />38 <br />38 <br /> <br />c. <br /> <br />Results of Classification. <br /> <br />39 <br /> <br />CHAPTER V. WATER SUPPLY AND HYDROLOGY. <br /> <br />40 <br /> <br />A. Streamflow <br /> <br />40 <br /> <br />. <br /> <br />I. Colorado River <br />2. Gila River <br />3. Other Streams. <br /> <br />40 <br />43 <br />44 <br /> <br />II <br />