Ardell Halvorson

USDA-ARS
Soil Plant Nutrient Research
Natural Resources Research Center
Fort Collins, CO
USA 80526-8119
Email: ardell.halvorson@ars.usda.gov

Papers:
123-2 Critical Precipitation Period for Dryland Corn Production.
339-5 Nitrogen Source Effects On Nitrous Oxide Emissions From a Strip-Tilled Corn Field.