Laserfiche WebLink
<br />3.8 Test Plot Soil Sampling <br />' Soil chemical analysis results are presented by Test Plot in Tables 32-34. Additional <br />discussion of the significance of sampling results is presented in Section 4.0. <br />' p13 <br />Values of pH varied from 8.0 to 8.4, a relatively small range. The lowest pH readings <br />occurred in the 0-6" sample from the Test Plot 2 24" treatment. The highest pH <br />' readings were split between the 0-6" sample from the Test Plot 1 12" treatment and the <br />samples from 12-48" in the Test Plot 1 48" treatment. The general trend in all test <br />plots was toward higher pH values with increasing depth. <br />' Conductivity (EC) <br />' EC values in the sampling varied widely from a low of 1.0 (0-6" sample; Test Plot 3 <br />24" treatment) to a high of 22.2 (18-24" sample from Test Plot 1 48" treatment) which <br />is also the sample yielding the highest pH and SAR values. As with pH, the general <br />trend was toward higher EC values with increasing soil depth in all test plots. <br />SAR <br />Individual cation concentrations will not be specifically discussed in detail, except as <br />they relate to sodium adsorption ratio. SAR values varied greatly from a low of 0.4 (0- <br />6" sample from Test Plot 1 24" treatment) to a high of 51.7 (18-24" sample from Test <br />Plot 1 48" treatment). The deeper soils tended to have the higher SAR values below <br />18" in depth. There was no specific evidence of significant salt migration to surface or <br />shallow depths, as indicated by sodium and SAR values. <br />1 <br />' 45 <br />