Baseline-Dependent Responses of Soil Organic Carbon Dynamics to Climate and Land Disturbances

Table 1

Land use/cover types and areal percentages within the study area.

Land use/cover type	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
Water (%)	9.8	9.8	9.4	11.3	9.5	9.5	9.4	9.5	9.5	9.6
Urban (%)	4.4	4.4	4.4	4.0	4.1	4.2	4.3	4.1	5.0	5.6
Forests (%)	0.5	0.5	0.5	0.5	0.6	0.5	0.5	0.5	0.6	0.6
Grassland (%)	34.5	34.5	33.0	31.6	29.0	30.5	29.7	32.6	27.6	31.0
Agricultural lands (%)
Pasture	14.0	14.0	14.0	14.0	14.0	14.0	14.0	14.0	13.9	13.9
Barley	4.3	4.3	1.6	3.7	0.5	2.2	1.3	1.0	0.6	0.1
Corn	0.5	0.5	1.8	3.9	1.9	2.4	0.2	5.3	4.7	13.5
Soybeans	1.0	1.0	4.7	5.0	11.6	21.3	17.7	14.5	19.9	14.6
Other crops	4.5	4.5	5.0	4.7	4.5	5.5	2.1	2.1	1.8	0.3
Spring wheat	8.2	8.2	12.6	6.8	15.0	3.8	7.2	6.1	5.6	3.6
Fallow	3.4	3.4	2.5	5.9	2.0	1.9	9.3	3.0	4.3	0.1
Sunflowers	10.7	10.7	6.3	4.3	3.1	0.0	0.1	3.0	1.7	0.9
Sum	46.5	46.5	48.4	48.2	52.6	51.0	51.9	49.1	52.6	47.0
Wetlands (%)	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.8	6.2
Sum (%)	100	100	100	100	100	100	100	100	100	100

The total land area is about 260 km².