PLATE I 



Representative plates from i to 400,000 bacterial dilution of acid yellow silty clay, 

 cropped and held under optimum moistiu-e conditions: 



A. — ^Aerobic plates, untreated. 



B. — Aerobic plates, treated with 2 tons of calcium carbonate. 



C. — Aerobic plates, treated with complete fertilizer. 



D. — ^Aerobic plates, treated with complete fertilizer and 2 tons of calcium carbonate. 



E. — Aerobic plates, treated with complete fertilizer and 6 tons of calcium carbonate. 



