Contact

John Sawyer Antonio Mallarino
Professor
Extension Soil Fertility Specialist
Department of Agronomy
3208 Agronomy Hall
Iowa State University
Ames, IA 50011
jsawyer@iastate.edu
(515) 294-7078
web site
Professor
Soil Fertility
Department of Agronomy
3216 Agronomy Hall
Iowa State University
Ames, Iowa 50011
apmallar@iastate.edu
(515) 294-6200
fax (515) 294-2458
web site