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<br />~ <br />co <br />~ <br />~ <br /> <br />5 <br /> <br />RESULTS <br /> <br />Effects of Salty Water on Soil Properties <br /> <br />The amount of irrigation and dates of application are shown in <br /> <br />Table 1. The total water application varied from near zero to about <br /> <br />70 cm (28 inches). The conductivity (EC) of the salty plot was about <br /> <br />10 times higher than the fresh plot and averaged about 20 percent higher <br /> <br />than 1981. <br /> <br />Table 2 and Figures A-2 through A-5 show the trends of the salinity <br /> <br />as expressed by electrical conductivity and chloride concentration. In <br /> <br />both the wet and.dry plots EC increased from 1980 both in the spring and <br /> <br />the fall samples for the salty plots. The reverse was generally true for <br /> <br />the fresh water plots. The same was generally true for the chloride <br /> <br />concentration data. <br /> <br />Table 3 (and Table A-I in Appendix) show details of the soil solu- <br /> <br />tion concentrations measured in 1981. As was usually true in previous <br /> <br />years, the EC concentrations in the fall were higher than in the spring <br /> <br />for both the salty and fresh plots. There were no consistent differences <br /> <br />between salinity measured for different crops. It would appear, from the <br /> <br />yield data discussed further on, that the salinity levels may have <br /> <br />increased enough during the year that yield was reduced especially where <br /> <br />water was not enongh for leaching. <br /> <br />Table 4 shows the salinity profiles for the different irrigation <br /> <br />levels. The highest EC was found in irrigation levels 3 and 4. This is <br /> <br />as expected because irrigation was insufficient for leaching salts out <br /> <br />of the profile. The trends were somewhat similar for chloride concentra- <br /> <br />tion but not as consistent. <br />