. Bulletin. Agriculture. 14 SOILS OF THE TRUCKEE-CARSON IRRIGATION PROJECT. practicaUv 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 DEPTH ^T W/Y/CH S/IMPLE5 \/^£R£ r^^K^N. ,0to6" 6rol2" l2rol8" I8':^24" 24^36' ^. Fig. 5.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats U;0 and 170, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat
. Bulletin. Agriculture. 14 SOILS OF THE TRUCKEE-CARSON IRRIGATION PROJECT. practicaUv 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 DEPTH ^T W/Y/CH S/IMPLE5 \/^£R£ r^^K^N. ,0to6" 6rol2" l2rol8" I8':^24" 24^36' ^. Fig. 5.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats U;0 and 170, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat lUO: Depth, 0 to G inches, parts per million; 0 to 12 inches, ;-12 to 18 inches, ; IS to 24 inches, O; 24 to 30 inches, From plat 170: Depth, 0 to (i inches, parts per million; 0 to 12 inches, (i; 12 to 18 inches, ; 18 to 24 inches, : 24 to 30 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 tlie same field, and was very similar except that the 1 This field had been irrigated a .^liorl lime l)ef()re ihe . were eollected. 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 United States. Bureau of Plant Industry. Washington : G. P. O.
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