Influence of Rhizobia and Mycorrhizae on nitrogen fixation and growth of peanuts in Thailand and the Philippines -- A. Rhizobium Considerations


The major goal was to improve the efficiency of symbiotic nitrogen fixation by rhizobium bacteria associated with peanuts, therefore an improvement of peanut yields. Secondarily, the improvement of nitrogen fixation by peanuts grown in rotation with non-legume crops can provide a source of nitrogen in the rotation. Optimization of biological nitrogen fixation is of considerable importance to the entire food and feed production program of these countries.


Producer values

Principal Investigator

Dr. G.H. Elkan, microbiologist, North Carolina State University.

Co-principal investigators

Dr. T.J. Schneeweis, microbiologist, North Carolina State University
Dr. Ruth Ann Taber, Mycorrhizae specialist, Texas A&M University


J.C. Wynne, breeder and, North Carolina State University


Philippine Collaborator

Dr. Erlinda Paterno, Institute of Biotechnology (Rhizobium); University of the Philippines at Los Banos

Philippine Cooperators

Dr. Lina Ilag, Institute of Plant Breeding (Mycorrhizae), University of the Philippines at Los Banos
Edilberto Redona, University of the Philippines at Los Banos
Dr. Remedios Abilay (breeding for high biological nitrogen fixation), University of the Philippines at Los Banos

Philippine Country Coordinator

Dr. Dely Gapasin, director of research, PCARRD.

Thailand Collaborator

Yenchai Vasuvat, (Rhizobium), Department of Agriculture, Bangkok

Thailand Cooperators

Dr. Nantakorn Boonkerd, (Rhizobium), Department of Agriculture, Bangkok
Preecha Vadeesirisak (Rhizobium), Department of Agriculture, Bangkok
Dr. Omsub Nopamornbodi (Mycorrhizae), Department of Agriculture, Bangkok
Dr. Orapin Bhumibhamon, microbiologist, Kasetsart University
Dr. Banyong Toomsan (Rhizobium), Khon Kaen University
Dr. Aran Patanothai (plant breeding), Khon Kaen University

Cameroon Cooperator

Timothy Schilling, Institute of Agronomic Research