Moisture content and physical condition of soils . cent. I 0 . 21467. 0 . .372 Per From the curve it will be seen that beginning at 217 per cent ofmoisture, which represents the saturation limit, there is very little - \. • .300Ann 1 1 1 1 I 1 1 1 jS 16 18 20 22 2 4 6 S 10 12 /4 P£fit CEA/r OF MO/SrUff£ Fig. 18.—Apparent-specific-gravity-moisture results for Leonardtown loam. decrease in volume over a wide range of moisture content. At 140per cent of water there is a sharp contraction in the volume whichcontinues down to 45 per cent,
Moisture content and physical condition of soils . cent. I 0 . 21467. 0 . .372 Per From the curve it will be seen that beginning at 217 per cent ofmoisture, which represents the saturation limit, there is very little - \. • .300Ann 1 1 1 1 I 1 1 1 jS 16 18 20 22 2 4 6 S 10 12 /4 P£fit CEA/r OF MO/SrUff£ Fig. 18.—Apparent-specific-gravity-moisture results for Leonardtown loam. decrease in volume over a wide range of moisture content. At 140per cent of water there is a sharp contraction in the volume whichcontinues down to 45 per cent, the air-dry condition. A series of check resultswas obtained by the cathe-tometer method, and isgiven in Table XXVI andfigure 20. The results arequite like those obtained bythe column method, indi-cating that there is a largechange between about 140per cent of moisture andthe air - dry condition. Itfollows that this soil ex-hibits the same critical changes in physical properties at the optimumwater content as were found in the other 60 100 120 140 160 180 200 pea csrtr of mo/sture Fig. 19.—Volume-moisture results for Muck by thesoil column method. 40 MOISTURE CONTENT AND CONDITION OF SOILS. Table XXVI.—Volume-moisture relations for muck by the cathetometer method. Moisture Linear Volume content. decrease. decrease. Per cent. Centimeter. Per cent. 210 185 .0 .0 164 .0 .0 120 .01 .76 84 .03
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