Hélio A. Joris

State University of Ponta Grossa
Soil Science
Gal Carlos Cavalcanti 4748
Ponta Grossa Brazil 84010-919
Email: hwjoris@yahoo.com.br

Papers:
11:00 AM, American Bank Center Bayview, Ballroom A CORN ROOT GROWTH and Nitrogen USE Efficiency as Affected by Gypsum and Nitrogen APPLICATIONS Under A NO-till SYSTEM.