1. Regional Planner, Acres International (Overseas) Ltd., Niagara Falls, Canada and Dacca, East Pakistan; formerly Research Assoc., and Administrative Asst. to Dir. of Iowa State Water Resources Research Inst., Iowa State Univ. of Science and Technology, Ames, Ia.
2. Prof. of Soils and Physics (Curtiss Distinguished Prof. of Agr.) and Dir., Iowa State Water Resources Research Inst., Iowa State Univ. of Science and Technology, Ames, Ia.