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(a)
(b) ( )
(c)3 4
1990
14.1
90 6.0% 1,163
1,261
10/17
2005
1,364
8.1
2004
1,355
7.4
(2006.10.17)
-
20
GPG
30cm (t-C/ha)
(t-C/ha)
1 6
18
18
18
1 CO2CO2