Soil nitrogen transformations and availability in soils; soil and plant residue management; soil organic matter characterization and interactions related to C/N cycling; relationship of organic matter-pesticide complexes to ground water quality; humic substances in soil and water; stable isotope C-13 and N-15 analysis.

B.S., Chemistry, University of Massachusetts, 1952
M.S., Soil Chemistry, Cornell University, 1954
Ph.D., Soil Chemistry, Cornell University, 1957