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<br /> <br />. <br /> <br />. <br /> <br />w <br />..... <br />co <br />00 <br /> <br />ILLUSTRATIONS <br /> <br />EiqUI~ <br /> <br />fsg~ <br /> <br />1. <br /> <br />Freeze protection afforded citrus nursery as a result <br />of overnight irrigation in Florida. Temperature was <br />approximately 27 degrees fahrenheit for 8 hours. <br /> <br />Destructive effect created by excessive amounts of <br />tailwater being lost from irrigated field having too <br />steep a grade for efficient irrigation. Hudspeth <br />county, Texas. <br /> <br />2. <br /> <br />3. <br /> <br />Excessive amount of tailwater being lost from irrigated <br />field. Note water flowing across highway. Hudspeth <br />county, Texas. <br /> <br />Considerable erosion caused by excessive irrigation on <br />light sandy soil. Gully depths are greater than two <br />feet. Near Caldwell, Idaho. <br /> <br />4. <br /> <br />5. <br /> <br />Erosion caused cy excessive irrigation. <br />County, California. <br /> <br />San Diego <br /> <br />6. Serious water erosion caused by excessive use of <br />irrigation water on too steep slopes. Approximately 75 <br />percent of the topsoil was lost in one irrigation, <br />Fremont County, Wyoming. 18 <br /> <br />7. Irrigation waste water erosion on a cultivated field. <br />Morrill County, Nebraska. 19 <br /> <br />8. citrus grove abandoned as result of build up of salt in <br />the soil. Coachella Valley, California. 27 <br /> <br />9. Salt damage to carrot crop, coachella Valley, <br />California. 29 <br /> <br />10. Sugar beets growing sparsely along salt-encrusted <br />ridges between irrigation furrows. Irrigation water <br />containing salts rose to the ridge surface through <br />capillary action and evaporated, leaVing the solids <br />behind. California. 30 <br /> <br />v <br /> <br />10 <br /> <br /> <br />14 <br /> <br />15 <br /> <br />16 <br /> <br />17 <br />