@article{coolman_robarge_1995, title={Sampling nitrous oxide emissions from humid tropical ecosystems}, volume={22}, ISSN={["0305-0270"]}, DOI={10.2307/2845934}, abstractNote={Nitrous oxide (N20), which is a long-lived green- house gas and the chief source of nitric oxide (NO) in the stratosphere, is an important catalyst in deletion of the ozone shield. The largest known natural or anthropogenic contribu- tion to current increasing levels of atmospheric nitrous oxide is from the humid tropics. This research reports the method- ologies developed for monitoring N20 emissions from differ- ent humid tropical ecosystems over 2 years near Manaus, Brazil. Use of a double injection valve process for the chro- matographic analysis of ambient levels of N20 eliminated the need for sample preparation and backflushing. The double injection valve process allows analysis of up to fifteen samples per hour for extended periods and provides excellent baseline stability and detector sensitivity. A closed, vented soil cover constructed of PVC pipe was used to monitor N20 emissions}, number={2-3}, journal={JOURNAL OF BIOGEOGRAPHY}, author={Coolman, RM and Robarge, WP}, year={1995}, pages={381–391} }
 @article{coolman_hoyt_1993, title={Increasing sustainability by intercropping}, volume={3}, number={3}, journal={HortTechnology}, author={Coolman, R. M. and Hoyt, G. D.}, year={1993}, pages={309} }
 @article{coolman_hoyt_1993, title={The effects of reduced tillage on the soil environment}, volume={3}, number={2}, journal={HortTechnology}, author={Coolman, R. M. and Hoyt, G. D.}, year={1993}, pages={143} }