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Irenus A. Tazisong, Ph.D

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Research Assistant Professor

Soil Biogeochemistry


Program Area Affiliation: Environmental Soil and Water Sciences


Department of Biological and Environmental Sciences

140 Agriculture Research Center

P.O. Box 1927 or 1208

Alabama A&M University

Normal, AL 35762


Phone: [256] 372 8438

Fax: [256] 373 8404


Tazisong CV


Degrees Earned

Ph.D.  Soil Science, Alabama A&M University, 2007

Dissertation: Enzymatic Hydrolysis and 31-P Nuclear Magnetic Resonance Spectroscopic Identification and Quantification of Organic Phosphorus

M.S.  Soil Science, Alabama A&M University, 2003

Thesis: Chemically Partitioned and Anaerobically Reduced Trace Metals in Soils

B. S. Geology, University of Buea – Cameroon, 1998.


NRE 406/506- Soil Microbiology/Biochemistry


Research Interests

My interest focuses on the role of phytases, phosphatases, and amidohydrolases on the biogeochemical cycling nutrients  in the environment, using and developing various analytical procedures and advanced instruments to understand mercury, arsenic and pesticides speciation in organic and inorganic production systems, use of 31-P NMR, FTIR, XANES, and EXAFS in the study of organic and inorganic phosphorus, carbon, and nitrogen in the environment, spatial distribution of nutrients, and composition, stability and interaction of humic substances in the environment, use of molecular techniques to characterize the microbial community structure and diversity of soil.


Research Activities

  • Studies on trace and heavy metal chemistry, chemical fractionation, and biologically reduced metals. 

  • Microbial diversity in agronomic systems                                                         

  • Impact of cropping systems and landscape positions on microbial respiration, CO2 fluxes and moisture variability.
  • Phosphatases and amidohydrolases hydrolysis of organic compounds and 31P NMR quantification of soil organic phosphorus.
  • Using FTIR and 13C NMR to determine composition, stability, and reactivity of humic substances.
  • Investigating spatial variability of phosphorus fractions in organic and inorganic production systems.
  • Investigating mercury and arsenic cycling in environmental samples.