Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 10/25/2001
Publication Date: 10/25/2001
Citation: Haney, R.L., Franzluebbers, A.J., Hons, F.M., Hossner, L.R., Zuberer, D.A. 2001. Is k2so4 extraction of microbial carbon ph dependent?. American Society of Agronomy Meetings.
Technical Abstract: On average, K2SO4 extracts only 56% as much C as water below pH 7.7, but 23% more C above pH 7.7 in unfumigated soil. Soil microbial biomass estimates using CFE with 0.5 M K2SO4 were 70% lower than with water when soil pH<7.7, but 29% greater when soil pH>7.7. Soil pH and ionic strength of extractant interact, indicating that CFE for soil microbial biomass C is soil pH dependent.