PLATE 7 



Representative plates from i to 40,000 bacterial dilution of acid brown silt loam 

 , kept at different moisture contents: 



Aj.— Aerobic plates from soil kept one-fourth saturated. 



Hi.— Anaerobic plates from soil kept one-fourth saturated. 



Cj —Aerobic plates of carbon-dioxid-surviving organisms from soil kept one-fourth 



saturated. 



A2.— Aerobic plates from soil kept one-half saturated. 



H2.— Anaerobic plates from soil kept one-half saturated. 



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



saturated. 



Aj.—Aerobic plates from soil kept fully saturated. 



H3.— Anaerobic plates from so^l kept fully saturated. 



C3.— Aerobic plates of carbon-dioxid-surviving organisms from soil kept fully 

 saturated. 



