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Soil Carbon Changes

Comparing Flux Monitoring and Mass Balance in a Box Lysimeter Experiment

USDA Forest Service, PNW Research Station., Corvallis, OR 97331 USA

View larger version (38K): [in a new window]   Fig. 1 Box lysimeters were made between cement barriers with various soil and manure mixtures. Lysimeters were lined and drainage was monitored

View larger version (17K): [in a new window]   Fig. 2 Mass balance (MB) and infra-red gas analyzer (IRGA) estimates of C loss over 244 d vs. initial soil-C. Error bars are 95% confidence intervals

View larger version (24K): [in a new window]   Fig. 3 The CO2 flux from box lysimeters measured by infra-red gas analyzer over the course of the experiment. Numbers to the left of lines are initial soil C content (kg m-2). Mean soil temperature and moisture by monitoring event are also shown