. Bulletin. Agriculture. NITRIFYTNG POWER OF SOILS AT DIFFERENT DEPTHS. 15 surface was a little more compact and the alfalfa was practically a failure. The nitrification curves show the same general variations, but the one of the poor soil is consistently below that of the productive soil. DEPTH /IT WH/CH S/JMPLES WEPE T/IKEN. ,0ro6" 6'^ 12" 12rol8" I8'^24" 24';-o36". Fig. 6.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plat ISO (poor soil) and plat 190 (good soil), Truckee-Carson Experiment Farm. Original uitrale
. Bulletin. Agriculture. NITRIFYTNG POWER OF SOILS AT DIFFERENT DEPTHS. 15 surface was a little more compact and the alfalfa was practically a failure. The nitrification curves show the same general variations, but the one of the poor soil is consistently below that of the productive soil. DEPTH /IT WH/CH S/JMPLES WEPE T/IKEN. ,0ro6" 6'^ 12" 12rol8" I8'^24" 24';-o36". Fig. 6.—Diagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plat ISO (poor soil) and plat 190 (good soil), Truckee-Carson Experiment Farm. Original uitrale present in samples from plat 180: Depth, 0 to 6 inches, 2 parts per million; 6 to 12 inches, ; 12 to 18 inches, ; 18 to 24 Inches, ; 24 to 30 inches, From plat 190: Depth, 0 to 6 inches, parts per million; G to 12 inches, ; 12 to 18 inches, ; 18 to 24 Inches, ; 24 to 36 inches, Plats 180 and 190 are located upon poor and good spots. The texture of the samples Is very similar, both being sandy, but the surface of plat 180, the unproductive soil, is hard and compact as if 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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