@inproceedings{inproceedings9163d414,
title   = {Minimizing the effect of mineral N on nodulation and N2-fixation in common bean by increasing P, K and S levees},
author = {Tsai, Siu Mui and Bonetti, Roberto and Agbala, S M},
year = {1989},
publisher = {Iowa State University},
booktitle   = {North American Symbiotic Nitrogen Fixation Conference}
}