. Bulletin. Agriculture. NITRIFYING POWEE OF SOILS AT DIFFERENT DEPTHS. 17 Figures 11 and 12 present the results obtained from samples of soil from plats 240, 250, 260, and 270. The fields in which these plats are 1 1 "° ^ 30 1 1 10 1 Nl 1 1 DEPr/y ^T WP/C^ S/7MP/.ES i^^£P£ Z^p-^A/. ^Qroe;' 6rol2" I2rol8" ; 24'^36" % 400 1 300 § 200 1 (00 ^ 1 -,00 1 1 â â^âi ij^hofeS'PlSL^:^ ^ -- '^^ A///n/es-0ar22O Fig. 9.âDiagram showing tlie nitrification of ammonium siilpiiate in samples of soil from different depths from plat 220, Truekee-Carson Experiment Farm. Origina
. Bulletin. Agriculture. NITRIFYING POWEE OF SOILS AT DIFFERENT DEPTHS. 17 Figures 11 and 12 present the results obtained from samples of soil from plats 240, 250, 260, and 270. The fields in which these plats are 1 1 "° ^ 30 1 1 10 1 Nl 1 1 DEPr/y ^T WP/C^ S/7MP/.ES i^^£P£ Z^p-^A/. ^Qroe;' 6rol2" I2rol8" ; 24'^36" % 400 1 300 § 200 1 (00 ^ 1 -,00 1 1 â â^âi ij^hofeS'PlSL^:^ ^ -- '^^ A///n/es-0ar22O Fig. 9.âDiagram showing tlie nitrification of ammonium siilpiiate in samples of soil from different depths from plat 220, Truekee-Carson Experiment Farm. Original nitrate present in samples: Depth, 0 to 6 inches, parts per million; (i to 12 inches, ; 12 to 18 inches, 10; IS to 24 inches, ;i4; 24 to ;3G inches, 6. located have been merely leveled and left fallow, receiving regular applications of irrigation water. The field containing plats 240 and 250 is never cultivated, while that containing plats 260 and 270 is I I I I Nl 40 30 20 -10 DEPTH /}T \^/H/CP S/JMP'LES tVEPE Ty^HEr/V. ,0to6" 6'toI2" I2'^I8" I8%24' 24"ro36". § 400 1 'o 300 ^ ^ 200 1 § ^ 100 1 Nl 0 1 ^ -100 » CK ai Fig. 10.âDiagram showing the nitriCcation of animoniinn sulphate in samples of soil from different depths from plat 2:'.0, Truckee-Carson Experiment Farm. Original nitrate present in samples: Depth, 0 to 6 inches, 10 parts per million; (i to 12 inches, ; 12 tol8inches,5; IS to24inches,;; 24 to ;J0 inches, !).i'.. cultivated according to thorough summer-fallow methods. As the conditions are abnormal it is not surprising that the curves of chlorids 78011°âBui. 211â11 3. 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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