Decomposition and Soil CO<sub>2</sub> Emission (Student Data)

Student Collected Data from this Experiment

Table 1. Soil respiration rates and key environmental variables measured in Fox Run watershed in central WV on May 14-15, 2005.
Treatment	Soil Respiration Rate (g CO₂ m^-2 d^-1)	St. Deviation	N	P-value*	Initial Soil Temp (C)	Soil pH	Initial Soil Water Content (g g^-1)
Forest	13.1	1.83	5		18.2	4.04	1.12
				0.042
Field	10.8	1.20	5		20.3	5.57	0.83

Notes: The forested site was a hardwood stand dominated by American Beech (Fagus grandifolia). The field site was a nearby abandoned farm field with sparse locust and apple trees. Incubation time was 25 hours and chamber area was 0.0227 m².

* Student’s t-Test (two-tailed, a=0.05).

Table 2. Soil respiration rates and key environmental variables measured in Fox Run watershed in central WV on 18-19 September 2004.
Treatment	Soil Respiration Rate* (g CO₂ m-2 d-1)	St. Deviation	N	Initial Soil Temp (C)	Initial Soil Water Content (g g-1)
Undisturbed	13.4 b	1.09	4	17.4	4.01

Logged	12.5 b	0.83	4	19.4	1.24

Logging Road	8.7 a	1.46	4	18.9	0.79

Notes: The Undisturbed site was a mixed hardwood stand. The Logged site was an adjacent stand that was clear cut one year prior. The Logging Road site was located within the clear cut stand with somewhat compacted and disturbed soil. Incubation time was 24 hours and chamber area was 0.0227 m2.

* Treatment effect was significant according to a one-way ANOVA (p < 0.05). Means followed by different letters were significantly different according to a Tukey multiple comparison test.