April - June 2007 - Kasetsart University

calculated TF value
calculated TF value
0.25
0.20
0.15
0.10
0.05
Kasetsart J. (Nat. Sci.) 41(2) 279
0.00
0.0 20.0 40.0 60.0 80.0 100.0
% Clay
Figure 3 Calculated TF values are shown as a function of clay content. The solid line is a curve fitted
to the data in the graph.
calculated TF value
0.25
0.20
0.15
0.10
0.05
0.00
0.00 0.20 0.40 0.60 0.80 1.00 1.20
0.25
0.20
0.15
0.10
0.05
Ex-K + (cmol c kg -1 )
Figure 4 Calculated TF values are shown as a function of exchangeable K + . The solid line is a curve
fitted to the data in the graph.
0.00
0.00 2.00 4.00 6.00 8.00 10.00 12.00
% OM
Figure 5 Calculated TF values are shown as a function of organic matter (OM) content. The solid line
is a curve fitted to the data in the graph.