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The following tables are general
values for equilibrium moisture con-
tent. The equilibrium moisture con-
tent is the moisture content that the
grain will eventually arrive at if ex-
posed to specific air conditions for
a long enough period of time. The
equilibrium moisture content does
EQUILIBRIUM MOISTURE TABLE FOR SHELLED CORN % WET BASIS
Temp.
degrees
10
35
5.2
40
5.0
45
4.9
50
4.8
55
4.7
60
4.6
65
4.5
70
4.4
75
4.3
80
4.2
85
4.2
90
4.1
4.0
95
100
3.9
EQUILIBRIUM MOISTURE TABLE FOR ROUGH RICE % WET BASIS
Temp.
degrees
10
35
6.3
40
6.1
45
6.0
50
5.9
55
5.8
60
5.7
65
5.6
70
5.6
75
5.5
80
5.4
85
5.3
90
5.3
95
5.2
100
5.1
18
LTD HEATER OPERATION
not tell us how fast the grain will lose
moisture to get to its equilibrium
moisture content. Generally, drying
air conditions with a lower equilib-
rium moisture content are used to
increase the rate of moisture re-
moval. The drying process is then
stopped before the grain can reach
Relative Humidity (percent)
20
30
40
7.6
9.5
11.3
7.4
9.3
11.0
7.2
9.0
10.8
7.0
8.8
10.5
6.9
8.6
10.3
6.7
8.5
10.1
6.6
8.3
9.9
6.4
8.1
9.7
6.3
8.0
9.5
6.2
7.8
9.3
6.1
7.7
9.2
6.0
7.6
9.0
5.9
7.4
8.9
5.8
7.3
8.7
Relative Humidity (percent)
20
30
40
8.3
9.9
11.3
8.2
9.7
11.1
8.0
9.6
10.9
7.9
9.4
10.7
7.7
9.2
10.5
7.6
9.1
10.4
7.5
9.0
10.2
7.4
8.8
10.1
7.3
8.7
9.9
7.2
8.6
9.8
7.1
8.5
9.7
7.0
8.4
9.6
6.9
8.3
9.4
6.8
8.2
9.3
equilibrium with the drying air. The
following tables should only be used
as a guide for management of grain
conditioning systems, possible de-
viations may occur due to varieties
and grain condition. (Values calcu-
lated from the Henderson-Thomp-
son equation.)
50
60
70
13.0
14.8
16.8
12.7
14.5
16.4
12.4
14.2
16.0
12.2
13.9
15.7
11.9
13.6
15.4
11.7
13.3
15.1
11.4
13.0
14.8
11.2
12.8
14.5
11.0
12.6
14.3
10.8
12.4
14.0
10.6
12.1
13.8
10.5
12.0
13.6
10.3
11.8
13.4
10.1
11.6
13.2
50
60
70
12.6
13.9
15.3
12.4
13.7
15.1
12.2
13.4
14.8
12.0
13.2
14.6
11.8
13.0
14.3
11.6
12.8
14.1
11.4
12.6
13.9
11.3
12.5
13.7
11.1
12.3
13.5
11.0
12.1
13.4
10.8
12.0
13.2
10.7
11.8
13.1
10.6
11.7
12.9
10.4
11.6
12.8
80
90
19.1
22.2
18.7
21.7
18.3
21.3
17.9
20.9
17.5
20.5
17.2
20.1
16.9
19.7
16.6
19.4
16.3
19.1
16.0
18.8
15.8
18.5
15.5
18.2
15.3
17.9
15.1
17.7
80
90
16.9
19.1
16.6
18.8
16.4
18.5
16.1
18.2
15.9
17.9
15.6
17.7
15.4
17.4
15.2
17.2
15.0
17.0
14.8
16.8
14.6
16.6
14.5
16.4
14.3
16.2
14.1
16.0
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