DENITRIFICATION. 93 
PLATS. 
N 
ty] 
FARTS PER MILLION OF NITROGEN AS NITRATES. 
soil from plats 180, 190, 170, 100, 120, 160, 110, and 150, Truckee-Carson Experiment Farm. Samples 
taken from depths of 12 to 18 inches. 
€2. 
OF 
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U1 
w 
o 
PARTS PER MILLION OF CHLORIDS AND SULPHATES. 
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s 
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: 
= 
, 
8 
S 
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Fig. 17.—Diagram showing the relation between the quantity of alkali and the nitrification in samples of 
soil from plats 180, 170, 190, 100, 110, 160, 150, and 120, Truckee-Carson Experiment Farm. Samples 
taken from depths of 18 to 24 inches. 
211 
