. Bacteriological studies of the soils of the Truckee-Carson Irrigation Project. Soil microbiology; Soils. 14 SOILS OF THE TRUCKEE-CARSON IRRIGATION PROJECT. practically failed to nitrify/ although the two plats appear to be very similar. Figure 5 shows the relative nitrifying power of good and poor soils collected from adjoining plats. Plat 160 has a loose sandy soil to a. 1200 1100 1000 S 900 i 5* 800 | <0 700 | 600 § 500 v I 400 s| 1 300 ft: 200 {0 100 5 Fig. 5.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 160 and 170, Truckee
. Bacteriological studies of the soils of the Truckee-Carson Irrigation Project. Soil microbiology; Soils. 14 SOILS OF THE TRUCKEE-CARSON IRRIGATION PROJECT. practically failed to nitrify/ although the two plats appear to be very similar. Figure 5 shows the relative nitrifying power of good and poor soils collected from adjoining plats. Plat 160 has a loose sandy soil to a. 1200 1100 1000 S 900 i 5* 800 | <0 700 | 600 § 500 v I 400 s| 1 300 ft: 200 {0 100 5 Fig. 5.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 160 and 170, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat 160: Depth, 0 to 6 inches, parts per million; 6 to 12 inches, ;'12 to 18 inches, ; 18 to 24 inches, 6; 24 to 36 inches, From plat 170: Depth, 0 to 6 inches, parts per million; 6 to 12 inches, 6; 12 to 18 inches, ; 18 to 24 inches, ; 24 to 36 inches, 3. depth of 18 inches; below this it is very heavy, but below 26 and 30 inches it is again lighter in texture. At the time of sampling, this plat was supporting a fine growth of alfalfa. Plat 170 is in the north- east corner of the same field, and was very similar except that the 1 This field had been irrigated a short time before the samples were collected. 211. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellerman, Karl F. (Karl Frederic), 1879-1934; Allen, Edward Riley, 1884-; United States. Department of Agriculture; United States. Bureau of Plant Industry; United States. Government Printing Office. Washington : U. S. Dept. of Agriculture
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