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This experiment was conducted to investigate the physical or chemical changes of mixed media made of several domestic organic materials such as straws and hulls of rice, saw dust, and peanut hull treated with 1%, 2% and 4% H₂O₂ or 10% Ca(OH)₂ with or without paddy field soil, respectively for potting media of Ficus benjamina. The porosity and moisture holding capacity of pot soil decreased due to cultivation. The pH of media increased only in pot soil containing peat moss and decreased in others. The organic matter, C/N ratio, CEC, K and P₂O_5 of all media decreased. The calcium content was high in Ca(OH)₂ treatment but it was much the same as other treatments. The saw dust, rice straw, and rice hull treated with H₂O₂ and saw dust treated with Ca(OH)₂ were proved to be good composts of Ficus benjamina as the heavy media. As for light media carbonized chaff, rice hull (H₂O₂), saw dust (Ca(OH)₂) and peanut hull (Ca(OH)₂) were proved to be proper composts with mixed ratio of 2 : 3 : 2 : 3 for dry weight increase of Ficus benjamina.
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