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<br />TABLE VII <br />CHEMICAL ANALYSES - EXCHANGEABLE SODIUM (%) Y <br /> <br /> Drained Plots SUbbed Plots <br />Amendment I 19,4 19;';' 1954 19', <br /> In:igationlt IrrigationlHt <br />0-7" Depth <br />None 8.2 44" 4.5 lO.O 44" 4.8 <br />None 9.6 20" 4.8 7.3 20" 4.5 <br />Gypsum 4-T 8.2 44" 2.2 4.9 44" 4.2 <br />Gypsum 4-'1' 6.8 20" 4.2 6.2 20" 5.6 <br />Krilium 7.4 44" 3.9 44" 4.4 <br />Kriliwn 20" 5.4 7.8 20" 4.0 <br />CaCl2 3.2T 44" 4.0 44" 4.9 <br />CaCl2 3.2T 6.7 20" 4.5 7.5 20" 4.2 <br />7-l8" Depth <br />None 5.4 44" 7.5 17,0 44" l4.2 <br />None l5.0 20" l2.6 8.l 20" 8.l <br />Gypsum 4-T 4.4 44" 3.6 6.7 44" 9.4 <br />Gypsum 4-T 4.3 20" 5.2 5.3 20" l2.4 <br />Krilium 5.9 44" 4.4 44" 8.8 <br />KrUium 5.6 20" 6.l 8.1 20" l3.2 <br />CaCl2 3.2T 44" 4.5 44" 7.3 <br />CaCl23.2T 4.6 20" . 4.7 4.2 20" 5.4 <br />18-33" Depth <br />None l3.0 44" l6.6 2l.0 44" 19.1 <br />None 22.0 20" 19.2 l6.0 20" l8.l <br />GypSUl1l 4-T 3.3 44" 4.4 l2.0 44" l3.8 <br />Gypsum 4-T 8.9 20" 5.l 9.7 20" 11.8 <br />KrUiUl1l 9.7 44" 5.2 44" l2.3 <br />Krilium 8.2 20" l2.3 15.0 20" l8.l <br />CaCl2 3.2T 44" 5.3 44" l5.4 <br />CaCl2 3.2T 6.3 20" 8.2 6.5 20" 8.2 <br />./ The exchangeable sodium values are the results of ana.l,yeee of soU s lea <br /> <br />8IIp <br />from 16 single plots all of which had received the 30 A-in. rate of leaclU.ng. <br />Soil with an exchangeable sodium percentage below 15 is considered to be <br />non-alkali. <br />* In 1954 all the drained plots received a total of 42 A-in. of surface <br />irrigation water in l4 irrigations. <br />** In 1954 all the subbed plots received a total of 39 A-in. or surface <br />irrigation water in l3 irrigations. <br /> <br />-17- r- -, {'~ ;,':~, '""1 <br />""",,-, "-...v_ . <br />