Agriculture Reference
In-Depth Information
100
10
90
20
80
30
70
Clay
40
60
50
50
Silty
Clay
Sandy
Clay
60
40
Silty Clay
Loam
Clay Loam
70
30
Sandy Clay Loam
80
20
Loam
Silt Loam
90
10
Sandy Loam
Loamy
Sand
Silt
Sand
100
Percent sand
Figure 2.7
A textural triangle based on the US Department of Agriculture particle size
classification (similar to that used in Europe). (White 2003; reprinted with permission of the
United States Department of Agriculture.)
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
5
7
9
11
13
15
17
19
Profile clay content (%)
Figure 2.8
Calibration graph for electrical conductivity in terms of profile
clay content. Twenty-five locations were selected at random from the EM38
map of figure 2.6A. The line of best fit between electrical conductivity and
clay content is shown. (Courtesy of Dr. Robert Bramley, CSIRO Ecosystem
Sciences, Adelaide, South Australia.)
