Table 1 Basic physical and chemical properties of the soils, and soil K testing values on control soils using different soil testing methods.

From: Comparison of soil analytical methods for estimating wheat potassium fertilizer requirements in response to contrasting plant K demand in the glasshouse

Site

Abbreviation

State

EC (ĀµS cmāˆ’1)

pH

Organic Carbon (%)

CaCl2 K (mg kgāˆ’1)

Colwell K (mg kgāˆ’1)

NH4OAc K (mg kgāˆ’1)

DGT K (mg Lāˆ’1)

Exchangeable Ca (cmol kgāˆ’1)

Exchangeable Mg (cmol kgāˆ’1)

CEC (cmol kgāˆ’1)

Clay (%)

Sand (%)

Silt (%)

Karoonda

KD

SA

93

6.43

0.28

73

71

77

7.2

0.7

0.2

1.0

3

95

2

Lake Bolac

LB

VIC

90

5.78

1.33

71

69

76

10.0

1.9

0.3

2.4

3

92

4

Ngarkat

NK

SA

17

6.55

0.62

20

21

22

2.6

0.9

0.1

1.0

4

94

2

Gindie B

QB

QLD

47

6.95

0.47

11

28

34

0.6

9.6

7.1

17.1

67

18

15

Capella B

QC

QLD

48

7.04

0.60

21

81

94

1.0

18.0

8.9

17.3

68

20

12

Kingaroy

QL

QLD

59

5.30

1.11

34

65

56

1.9

2.3

1.3

27.5

41

43

16

Jandowae

QS

QLD

67

6.01

0.51

44

100

135

1.2

7.2

6.2

14.9

66

12

22

Regans Ford

RF

WA

141

6.14

2.17

48

52

56

6.4

3.1

0.3

3.6

4

94

2

Wickepin

WN

WA

69

5.32

0.81

32

47

37

3.9

0.7

0.1

1.0

6

88

6

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