The 2010 ASHS Annual Conference

Timothy K. Hartz

University of California
Dept. of Plant Sciences
One Shields Avenue
Davis, CA
USA 95616-8683
Email: tkhartz@ucdavis.edu

Papers:
Humic Substances Provide No Consistent Agronomic Benefit in Representative Field Soils Reducing the Environmental Water Quality Impact of California Lettuce Production Nitrogen Requirements for Lettuce Production