Johannes Lehmann

Curriculum vitae

Professional preparation:

Ph.D. Institute of Soil Science
University of Bayreuth, Germany
Summa Cum Laude, 1997
Dissertation: Below-ground Interactions in a Runoff Agroforestry System in Northern Kenya

Diplom (M.Sc.) Institute of Soil Science
University of Bayreuth, Germany
With Honors, 1993

Appointments:

2001 to present
Assistant Professor, Soil Fertility Management
Department of Crop and Soil Sciences, Cornell University, USA
Primary research interests are biogeochemistry of carbon and nutrients in soil to nutrient cycling in agroecosystems ranging from rhizosphere to landscape scales. Teaching includes one undergraduate and one graduate course.

1997 to 2000
Project Coordinator, Brazil
Institute of Soil Science, University of Bayreuth, and Federal Research Institution for Forestry and Forest Products (BFH), Hamburg, Germany
Coordinate and supervise an international research team within the SHIFT-Program (Studies on Human Impact on Forests and Floodplains in the Tropics) for the recultivation of degraded field sites in the central Amazon, Brazil, in cooperation with the Brazilian Agricultural Research Organization (Embrapa). Primary research includes water and nutrient cycling in mixed fruit tree production systems using tracer techniques, focusing on nutrient acquisition and fate of applied nutrients. Oversee management of $700,000 budget, ten technical staff and ten international student researchers. Teaching duties include one graduate course per year and graduate lectures in Soil Fertility and Plant Nutrition in the Tropics held in English.

1994-1996
Field Project Leader, Kenya
Institute of Soil Science and Soil Geography, University of Bayreuth
Planned and implemented a research project to increase crop production through irrigation in the arid North of Kenya for the German Ministry of Economic Cooperation (BMZ) in cooperation with the University of Beer Sheva, Israel, the University of Nairobi, Kenya, and the International Centre for Research in Agroforestry (ICRAF). Assessed the effects of intercropping and tree management on nutrient and water uptake, root interactions and root dynamics. Collaborated with Agriculture Extension Officers and local landowners for the dissemination of project results. Managed $200,000 budget, local field staff and supervised eight student researchers.

Apr-Oct 1992
Field Research Manager, Togo
Institute of Soil Science and Soil Geography, University of Bayreuth
Managed research project for the development of agroforestry systems in central Togo for the GTZ in collaboration with the Direction Regional de Development Rural (DRDR). Activities concentrated on tree species effects on nutrient competition between trees and crops, litter decomposition, nutrient release from mulch and soil fertility improvement.

Aug-Nov 1991
Field Researcher, Sudan
Institute of Soil Science and Soil Geography, University of Bayreuth
Organized and led a land suitability assessment in the Jebbel Mara Area/Western Sudan for the GTZ and the Sudanese Forestry Department. The survey assessed biophysical conditions for designating mountain ecosystems for environmental protection and for landuse including aspects of soil fertility, erodibility and degradability.

 

Teaching experience:

Soil fertility and plant nutrition in tropical cropping systems
Soil fertility and land-use in Africa
Soil geography in tropical and temperate regions
Soil fertility management
Nutrient Cycling in Natural and Managed Ecosystems

Professional Activities:

Review of scientific manuscripts and proposals

Member
American Society of Agronomy
German Society of Soil Science
German Society of Tropical Ecology

 

Publications:

see publications page