PLATE 5 



Representative plates from i to 40,000 bacterial dilution of acid yellow silty clay 

 kept at different moisture contents: 



Aj. — Aerobic plates, from soil kept one-half saturated. 



Hj. — Anaerobic plates, from soil kept one-half saturated. 



C2. — Aerobic plates of carbon-dioxid-surviving organisms from soil kept one-half 

 saturated. 



A3. — Aerobic plates from soil kept fully satiu-ated. 



H3. — ^Anaerobic plates from soil kept fully saturated. 



C3. — Aerobic plates of carbon-dioxid-siu^iving organisms from soil kept fully 

 satiu-ated. 



