[vanderleck] 



BACTERIA OF FROZEN SOILS 



27 



unexpectedly low bacterial count was accompanied by an unusually 

 low moisture percentage, due to absorption by the frozen soil just 

 above it. 



Conclusions. 



1. Bacteria increased rapidly in numbers when raw material was 



available for decomposition. The increase took place both in 

 frozen and unfrozen soil. 



2. A low moisture content of the soil was accompanied by a low 



bacterial content. 



3. During a period of frozen soil in March bacteria increased in 



numbers. 



4. Thawing of frozen soil was followed by a reduction in the numbers 



of bacteria. 



Experiment II. 



Table II. a. Sod Covered Field Seven Years Old. 



Average Number of Bacteria {in millions) per gr. of Soil at different depths. 



Table lib. 

 {Bacterial Count in Millions). 



