Geoscience Reference
In-Depth Information
Table 3.7
Characteristics of some British peat (
after
Hobbs, 1986).
$
Cation exchange capacity
** Mire water tends to have somewhat high values
To measure the CEC at soil pH, 2.0 g of soil sample and 20mL of 0.1M BaCl
2
-
2H
2
O are mixed in a centrifuge tube, shaken for 2 hours in a shaker and centrifuged
at 1,000 rpm. 20mL of 2mM BaCl
2
-2H
2
O is then added and shaken for 1 hour.
The samples are centrifuged and the supernatant discarded again. The addition of
