|
To
Convert
|
Multiply
|
By
(decimals omitted)
|
To
obtain
|
|
Milliequivalents
per 100 grams
of soil to
pounds per acre 0-6" (assuming
2,000,000 pounds of soil per acre
6 inches)
|
Milliequivalents
per 100 grams of soil
|
Equivalent
weight x 20
|
Pounds
per acre 0-6"
|
|
Ca
|
400
|
Ca
|
|
Mg
|
243
|
Mg
|
|
Na
|
460
|
Na
|
|
K
|
782
|
K
|
|
Cl
|
710
|
Cl
|
|
HC03
|
1220
|
HC03
|
|
C03
|
600
|
C03
|
|
S04
|
960
|
S04
|
|
N03
|
1240
|
N03
|
|
CaS04.2H2O
|
1721
|
CaS04.2H2O
|
|
CaC03
|
1000
|
CaC03
|
|
To
Convert
|
Multiply
|
By
|
To
obtain
|
|
Milliequivalents
to
milligrams
|
Milliequivalents
|
Equivalent
weight
|
Milligrams
|
|
Ca
|
20.04
|
Ca
|
|
Mg
|
12.16
|
Mg
|
|
Na
|
23.00
|
Na
|
|
K
|
39.10
|
K
|
|
Cl
|
35.46
|
Cl
|
|
S04
|
48.03
|
S04
|
|
C03
|
30.00
|
C03
|
|
HC03
|
61.01
|
HC03
|
|
P04
|
31.65
|
P04
|
|
CaS04.2H2O
|
86.09
|
CaS04.2H2O
|
|
CaC03
|
50.04
|
CaC03
|
|
S
|
16.03
|
S
|
|
H2S04
|
49.04
|
H2S04
|
|
Al2(S04)3.18H2O
|
111.07
|
Al2(S04)3.18H2O
|
|
FeS04.7H2O
|
139.01
|
FeS04.7H2O
|
|
N03
|
62.00
|
N03
|
a/ Some
of the conversion factors included in this section are not necessary
to the methods of analysis included in this manual. They do, however,
relate to many of the uses to which data of chemical analyses of soils,
plants, and waters are put. Nearly all of the conversion factors listed
here can be found in handbooks of one kind or another, but are collected
here for the convenience of research workers and analysts to save
their time in searching for a particular conversion wanted at the
moment.
|
To
Convert
|
Multiply
|
By
|
To
obtain
|
|
Milliequivalents
per liter to parts per million
|
Milliequivalents
|
Equivalent
weight
|
Parts
per million
|
|
Ca
|
20.04
|
Ca
|
|
Mg
|
12.16
|
Mg
|
|
Na
|
23.00
|
Na
|
|
K
|
39.10
|
K
|
|
Cl
|
35.46
|
Cl
|
|
S04
|
48.03
|
S04
|
|
C03
|
30.00
|
C03
|
|
HC03
|
61.01
|
HC03
|
|
P04
|
31.65
|
P04
|
|
CaS04.2H2O
|
86.09
|
CaS04.2H2O
|
|
CaC03
|
50.04
|
CaC03
|
|
S
|
16.03
|
S
|
|
H2S04
|
49.04
|
H2S04
|
|
Al2(S04)3.18H2O
|
111.07
|
Al2(S04)3.18H2O
|
|
FeS04.7H2O
|
139.01
|
FeS04.7H2O
|
|
N03
|
62.00
|
N03
|
|
To
Convert
|
Multiply
|
By
|
To
obtain
|
|
Temperature
units
|
Temp.
(oC) + 17.78
Temp. (oF) - 32 .555
Temp. (oC) + 273 1
Temp. (oF) + 460 1
|
1.8
.555
1
1
|
Temperature
(oF)
Temperature (oC)
Absolute temperature (oC)
Absolute temperature (oF)
|
|
Concentration
units
|
EC
x 103 a/
EC x 103
EC x 103
|
10
640
0.36
|
Milliequivalents
per liter,approximate only (in range 0. 1 to 5. 0 milli-mhos
per centimeter)
Parts
per million,approximate only (inrange 0. 1 to 5. 0 milli-mhos
per centimeter)
Osmotic
pressure (in range 3 to 30 millimhos per centimeter)
|
| |
Parts
per million
Parts per million
Parts per million
|
1.
0
0.00136
2.
72
|
Milligrams
per liter
Tons salt per acre-foot water
Pounds salt per acre-foot water
|
| |
Tons
per acre
Tons
per acre
|
20.8
1000
|
Grams
per square foot
Grams
per 48 square feet
|
| |
Pounds
per acre
Pounds per square foot
|
|
Pounds per 100 square feet
Pounds
per acre
|
a/EC
x 103 = Electrical conductivity in millimhos per centimeter.