PLATE 4 



Representative plates from i to 400,000 bacterial dilution of acid dark-brown peat, 

 cropped and held under optimum moisture conditions: 



A. — Aerobic plates, untreated. 



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



C. — Aerobic plates, treated with 20 tons of calcium carbonate. 



D. — Anaerobic plates, untreated. 



E. — Anaerobic plates, treated with 2 tons of calcium carbonate. 



F. — Anaerobic plates, treated with 20 tons of calcium carbonate. 



