Table IV .—Effect of variations in depth of column , moisture content , and compactness upon nitrate accumulation 
[Results are expressed as gain or loss in milligrams of NO3 per 100 gm. of soil] 
Oct, 8, 1917 
Nitrate-Nitrogen Accumulation in Soil 
49 
<9 
4143414143^^4343 
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I I 
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43,4,443.0 
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<<<% 
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M M H H H 
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4 4 4 4 
43 43 43 43 43 4343 43.4 43 43 43 43 43.443,4.4.4 43,4 43 
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434143434: 
««< 
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« 
O O V 'too o to 00 
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<» A, B, C, etc. are successive layers of the same column. 
& Ab= NH3 abundant; S==some NH3; T=*NHa trace; X=« sample not analyzed, because sample above showed complete loss erf NO 
c Compact samples not set up. 
