. Bulletin. Agriculture. 20 SOILS OF THE TKUCKEE-CAESON lEEIGATION PROJECT. standpoint. The results are all expressed in Table I as parts of nitrogen per million of the Fig. âDiagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 280 and 290, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat 2S0: Depth, 0 to (i inches, 12 parts per million; 6 to 12 inches, 10; 12 to IS 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, 60;
. Bulletin. Agriculture. 20 SOILS OF THE TKUCKEE-CAESON lEEIGATION PROJECT. standpoint. The results are all expressed in Table I as parts of nitrogen per million of the Fig. âDiagram showing the nitrification of ammonium sulphate in samples of soil from different depths from plats 280 and 290, Truckee-Carson Experiment Farm. Original nitrate present in samples from plat 2S0: Depth, 0 to (i inches, 12 parts per million; 6 to 12 inches, 10; 12 to IS 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, 60; 12 to IS inches, ; 18 to 24 inches, 60; 24 to 36 inclies, 60. Table I.âNitrification in solution of samples of soil from plats 100. IW. 180, 190, 260, 270, and 280,^ Truckee-Carson Experiment Farm. Incubated at 28° C. 220, Ammonia to nitrite Nitrite to nitrate No. of plat. Depth of soil. (parts per (parts per million! » 6 days. 12 days. 10 days. 20 days. Inches. 100 0-6 fi. 50 25 96. 00 6-12 25 64. SO 12-18 18 110 0-6 .50 15 6-12 12-18 20 25 180 0-6 15 6-12 15 â 12-18 0 00 00 190 0-6 1. 00 Hi 220 0-6 0. 00 00 6-12 00 12-18 00 260 0-6 17 76. 80 6-12 10 12-18 10 270 0-6 fi. .50 20 6-12 00 ⢠60. 00 280' 0-6 .). ,.1 20 81. 60 6-12 20 12-18 20 > Plat 280 is locatod in an old alfalfa field one-fourth mile north of Fallon. s Used medium for isolating nitrite bacteria. 'â > 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 United States. Bureau of Plant Industry. Washington : G. P. O.
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