To convert Multiply By To obtain Milliequivalents ...

To convert

Milliequivalents

per 100 grams

of soil

to

pounds per acre

0-6" (assuming

2, 000, 000 pounds

of soil per acre

6 inches)

Multiply

By

(decimals

omitted)

Milliequivalents

per 100 grams

of soil

Equivalent

weight

x 20

To obtain

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

CaS04.2H20

1721

CaS04.2H20

CaC03

1000

CaC03

USEFUL CONVERSION FACTORS

Type of conversion

Milliequivalents to

milligrams

Multiply

By

To obtain

Milliequivalents

Equivalent

weight

20.04

12.16

23.00

39. 10

35.46

48.03

30.00

61.01

31.65

86.09

50.04

16.03

49.04

111.07

139.01

62.00

Milligrams

Ca

Mg

Na

K

Cl

S04

C03

HC03

P04

CaS04?2H2O

CaC03

S

H2S04

Al2(S04)3?18H20

FeS04?7H20

N03

Ca

Mg

Na

K

Cl

S04

C03

HC03

P04

CaS04?2H20

CaC03

S

H2S04

Al2(S04)3?18H20

FeS04?7H20

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.

Type of conversion

Milliequivalents

per liter

to

parts per million

Multiply

By

Milliequivalents

per liter

Equivalent

weight

Parts per million

20.04

12. 16

23.00

39. 10

35. 46

48.03

30.00

61.01

31.65

86. 09

50.04

16. 03

49.04

111. 07

139.01

Ca

Mg

Na

K

Cl

S04

C03

HC03

P04

CaS04?2H2O

CaC03

S

H2S04

Al2(S04)3?18H20

FeS04?7H20

Ca

Mg

Na

K

Cl

S04

C03

HC03

P04

CaS04?2H2O

CaC03

S

H2S04

Al2(S04)3?18H20

FeS04?7H20

To obtain

To convert

Temperature

units

Multiply

Temp. (oC) + 17.78

Temp. (oF) - 32

Temp. (oC) + 273

Temp. (oF) + 460

Concentration EC x 103 a/

tion units

a/

By

1.8

.555

1

1

10

To obtain

Temperature (oF)

Temperature (oC)

Absolute temperature (oC)

Absolute temperature (oF)

Milliequivalents per liter,

approximate only (in

range 0. 1 to 5. 0 millimhos per centimeter)

EC x 103

640

Parts per million,approximate only

(inrange 0. 1 to 5. 0 millimhos per centimeter)

EC x 103

0.36

Parts per million

1. 0

Osmotic pressure (in

range 3 to 30 millimhos

per centimeter)

Milligrams per liter

Parts per million

0.00136

Tons salt per acre-foot water

Parts per million

2. 72

Pounds salt per acre-foot water

Tons per acre

20.8

Grams per square foot

Tons per acre

Pounds per acre

1000

.002296

Grams per 48 square feet

Pounds per 100 square feet

Pounds per square foot

43, 560

Pounds per acre

EC x 103 = Electrical conductivity in millimhos per centimeter.

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