APPENDIX 4 - Physico-chemical Characterization of Gypsic Xerosols, Spain

(Courtesy of Prof. Luis Alias Perez)

Profile 1

Location:

Jumilla, Murcia, Spain

Parent material:

Colluvial sediments derived by erosion from Triassic materials

Site:

Gentle slope, moderately well drained, planted with fruit trees and vines, very slightly salt-affected

Analytical data:

Horizon

Depth

OM

C

N

C/N

CaCO₃

pH

(cm)

(%)

(%)

(%)

(%)

H₂O

KCl

Au1

0-9

1.32

0.77

.062

12.43

14.7

7.80

7.60

Au2

9-17

1.15

0.67

.069

9.66

17.9

7.80

7.60

Cy1

17-28

0.27

0.16

.013

12.05

0.9

7.90

7.85

Cy2

28+

0.03

0.02

.024

4.0

7.80

7.50

Horizon

CEC

EC

N

Gypsum

Water content %

mEq/100 g

(dS m^-1)

(%)

(%)

1/3 bar

15 bar

Au1

6.37

2.81

0, 07

4.17

21.8

14.6

Au2

8.58

2.37

0.05

0.34

19.6

14.9

Cy1

1.84

2.59

0.08

22.45

30.2

13.8

Cy2

2.89

2.54

0.07

14.54

17.6

11.3

Composition of saturated extract (mEq dm^-3):

Horizon

Cl^-

SO₄^2-

HCO₃^-

Na⁺

K⁺

Mg²⁺

Ca²⁺

SAR

Au1

2.2

23.9

0.6

1.9

0.4

11.6

13.6

0.5

Au2

6.6

14.1

0.6

1.7

0.3

8.9

11.6

0.5

Cy1

5.6

16.3

0.8

3.1

0.6

10.6

9.7

0.9

Cy2

11.1

15.1

0.8

2.6

0.2

14.5

11.6

0.7

Available nutrients in soil (ppm):

Horizon

K*

Mg*

Fe**

Mn**

Cu**

Zn**

p***

Au1

12.75

232

1.5

2.1

2.5

0.3

2.2

Au2

11.50

698

1.6

3.5

2.4

0.3

3.3

Cy1

4.25

465

0.4

1.4

0.6

0.2

1.1

Cy2

5.25

232

1.1

*

Soluble and exchangeable

**

DPTA-extractable

***

Olsen-P

Profile 2 (Saline phase)

Location:

Jumilla, Murcia, Spain

Parent materia:

Sedimentary gypsum

Natural vegetation:

Artemesia, Moricandia

Site:

Well drained, almost flat, slightly saline, planted with almond

Analytical data:

Horizon

Depth

OM

C

N

C/N

CaCO₃

pH

(cm)

(%)

(%)

(%)

(%)

H₂O

KCl

Ap1

0-12

0.98

0.57

.075

7.6

8.2

7.7

7.3

Ap2

12-37

1.12

0.65

.064

10.2

7.7

7.9

7.8

Cy1

37-53

0.52

0.30

.062

1.0

8.9

8.8

Cy2

53-67

0.14

0.08

.058

2.3

8.8

8.7

Cy3

67-86

0.10

0.06

.054

3.5

8.5

8.3

C

86+

0.03

0.02

.053

1.9

8.4

8.0

Horizon

CEC

EC

N

Gypsum

Water content %

mEq/100 g

(dS m^-1)

(%)

(%)

1/3 bar

15 bar

Ap1

4.2

2.52

0.05

53.6

19.7

15.0

Ap2

3.2

4.12

0.09

70.1

24.4

16.3

Cy1

1.0

10.67

0.24

92.2

35.3

16.6

Cy2

1.1

12.61

0.26

97.1

32.5

16.2

Cy3

0.6

3.20

0.05

76.5

22.3

11.1

C

2.9

4.27

0.08

62.4

21.4

13.4

Location:	Jumilla, Murcia, Spain
Parent material:	Colluvial sediments derived by erosion from Triassic materials
Site:	Gentle slope, moderately well drained, planted with fruit trees and vines, very slightly salt-affected

Horizon	Depth	OM	C	N	C/N	CaCO₃	pH
Horizon	(cm)	(%)	(%)	(%)	C/N	(%)	H₂O	KCl
Au1	0-9	1.32	0.77	.062	12.43	14.7	7.80	7.60
Au2	9-17	1.15	0.67	.069	9.66	17.9	7.80	7.60
Cy1	17-28	0.27	0.16	.013	12.05	0.9	7.90	7.85
Cy2	28+	0.03	0.02	.024		4.0	7.80	7.50

Horizon	CEC	EC	N	Gypsum	Water content %
Horizon	mEq/100 g	(dS m^-1)	(%)	(%)	1/3 bar	15 bar
Au1	6.37	2.81	0, 07	4.17	21.8	14.6
Au2	8.58	2.37	0.05	0.34	19.6	14.9
Cy1	1.84	2.59	0.08	22.45	30.2	13.8
Cy2	2.89	2.54	0.07	14.54	17.6	11.3

Horizon	Cl^-	SO₄^2-	HCO₃^-	Na⁺	K⁺	Mg²⁺	Ca²⁺	SAR
Au1	2.2	23.9	0.6	1.9	0.4	11.6	13.6	0.5
Au2	6.6	14.1	0.6	1.7	0.3	8.9	11.6	0.5
Cy1	5.6	16.3	0.8	3.1	0.6	10.6	9.7	0.9
Cy2	11.1	15.1	0.8	2.6	0.2	14.5	11.6	0.7

Horizon	K*	Mg*	Fe**	Mn**	Cu**	Zn**	p***
Au1	12.75	232	1.5	2.1	2.5	0.3	2.2
Au2	11.50	698	1.6	3.5	2.4	0.3	3.3
Cy1	4.25	465	0.4	1.4	0.6	0.2	1.1
Cy2	5.25	232					1.1

Location:	Jumilla, Murcia, Spain
Parent materia:	Sedimentary gypsum
Natural vegetation:	Artemesia, Moricandia
Site:	Well drained, almost flat, slightly saline, planted with almond