. Bacteriological studies of the soils of the Truckee-Carson Irrigation Project. Soil microbiology; Soils. 20 SOILS OF THE TEUCKEE-CABSOX LRBIGATIOX PEOJECT. standpoint. The results are all expressed in Table I as parts of nitrogen per million of the Fig. 13.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 2S0 and 290, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat 2S0: Depth, 0 to 6 inches, 12 parts per million; 6 to 12 inches, 10; 12 to 18 inches, 6; 18 to 24 inches, 15; 24 to 36 inches,
. Bacteriological studies of the soils of the Truckee-Carson Irrigation Project. Soil microbiology; Soils. 20 SOILS OF THE TEUCKEE-CABSOX LRBIGATIOX PEOJECT. standpoint. The results are all expressed in Table I as parts of nitrogen per million of the Fig. 13.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 2S0 and 290, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat 2S0: Depth, 0 to 6 inches, 12 parts per million; 6 to 12 inches, 10; 12 to 18 inches, 6; 18 to 24 inches, 15; 24 to 36 inches, From plat 290: Depth, 0 to 6 inches, 60 parts per million; 6 to 12 inches, 60j 12 to 18 inches, ; 18 to 24 inches, 60; 24 to 36 inches, 60. Table I.—Nitrification in solution of samples of soil from plats 100, 110. 180, 190. 220. 260, 270, and 280} Truckee-Carson Expiriment Farm. Incubated at 28° C. Ammonia to nitrite Nitrite to nitrate No. of plat. Depth of soil. (parts per milhon, (parts per million) s 6 days. 12 days. 10 days. | 20 days. Inches. 100 0-6 6. 50 25 6-12 25 12-18 18 81,60 110 0-6 6-12 .50 15 20 180 12-18 0-6 i 25 15 24 00 6-12 j 15 12-18 ; 00 190 0-6 ( 16 74 00 220 0-6 00 13. 20 SO. 00 6-12 : 00 12-18 ' 00 260 0-6 17 76. SO 74 00 6-12 10 57. 60 54 40 12-18 i 10 270 0-6 20 9. 60 43. 20 6-12 00 8. 64 60. 00 2801 0-6 5. 75 20 6-12 20 40. SO 12-18 20 i 1 Plat 280 is located in an old alfalfa field one-fourth mile north of Fallon. 2 Used medium for isolating nitrite bacteria. 3 Used medium for isolating nitrate bacteria. 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 K
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