Fig. 1. Relationship between compost CO2 evolution and organic carbon concentration. Water(2h)–extractable fulvic acid and NaOH(2h)–extractable fulvic acid represent samples sequentially extracted for 2 h with water and NaOH, respectively.
Fig. 1. Relationship between compost CO2 evolution and organic carbon concentration. Water(2h)–extractable fulvic acid and NaOH(2h)–extractable fulvic acid represent samples sequentially extracted for 2 h with water and NaOH, respectively.