PubAg

Main content area

Automated carbon efflux system

Author:
Butnor, J.R., Maier, C.A., Johnsen, K.H.
Source:
United States Department of Agriculture patents 2004 no.US 6,692,970 B2
Subject:
carbon dioxide, gas emissions, measuring devices, automation, equipment design, soil respiration, soil microorganisms, biological activity in soil, patents, USDA, United States
Abstract:
A method and apparatus are provided for measuring the gas efflux from a substrate. In particular, one or more measuring chambers receive a gas enriched air from the substrate. A respiration system sends reference air having a known gas concentration to the measuring chamber. The reference air mixes with the gas enriched air to form a mixed air, which is returned to the respiration system. The respiration system then measures the gas efflux of the substrate over the given amount of time.
Agid:
6449
Handle:
10113/6449