2002 journal article
Tracking nitrogen loading reductions from agricultural sources: NLEW
Climate Variability and Change : Hydrological Impacts.
2000 journal article
The Spatial Information Research Laboratory at North Carolina State University
Proceedings of the 5th International Conference on Precision Agriculture, Bloomington, Minnesota, USA, 16-19 July, 2000, 1.
Soil testing for phosphorus: Environmental uses and implications
Raleigh, N.C.: North Carolina State University.