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<br />~:) <br /> <br />LI S T OF TABLES <br /> <br />~ <br />~ Table 1. Conductivity In mlcrombo/cm and ion concentration in meg/l as a <br />~ function of total dissolved solids in ppm. Potential salinity dnd SAR <br />~ <br />a re I nd I cated. <br />Table 2. Calculation of exchangeable sodium percentage in soils at the surface <br />and at the base of the root zone with 10, 20, 30, and 4~!o leaching ratios, <br />after.Rhodes (1972). <br />Table 3. 95% confidence intervals of conductivities of s'aturated soi 1 ex- <br />tracts on four textured classes from two samples per year over 10 years <br />on the Imperial Valley Field Station, <br />Table 4. Ratios of mean conductivity of saturated soil extract - mean con- <br />ductivityof irrigation water, 1.41 mmhdcm. <br />Table 5. Crop acreage distribution in Imperial County, <br />Table 6, 95% confidence interval of yields of crops from 1965 to 1972. <br />Table 7. Projected median conductivity of saturated soil extracts at <br />different TDS levels. <br />Table 8. Effective values of soil saturation extract conductivities in 4 <br />soils, 6 TDS levels, and 5 Irrigation management levels. <br />Table 9. Projected yields of Imperial Valley alfalfa with 4 levels of surface <br />irrigation intensity and sprinkler irrigation on 4 soil draInage classes. <br />Table 10. Projected yields of Imperial Valley asparagus with 4 levels of <br />surface irrigation intensity and sprinkler irrigation on 4 soil <br />drainage classes. <br />Table II. Projected yields of Imperial Valley barley with 4 levels of surface <br />irrigation intensity and sprinkler irrigation on 4 soil drainage classes. <br />Table 12. Projected yields of Imperial Valley cantaloupe with 4 levels of <br />surface irrigation Intensity and sprinkler irrigation on 4 soil drainage <br />classes. <br />Table 13. Projected yields of Imperial Valley carrots with 4 levels of sur- <br />face irrigation Intensity and sprinkler Irrigation on 4 soil drainage <br />classes. <br />Table 14. Projected yields of Imperial Valley cotton with 4 levels of surface <br />irrigation intensity and sprinkler irrigation on 4 soil drainage classes. <br />Table 15. Projected yields of Imperial Valley lettuce with 4 levels of surface <br />irrigation intensity and sprinkler Irrigation on 4 soil drainage classes. <br /> <br />4 <br />