Table 1 Physio-chemical characteristics and mineral elements of soils from the different rhizospheres of walnut trees.

From: Characterization of plant growth-promoting rhizobacteria (PGPR) in Persian walnut associated with drought stress tolerance

Rhizosphere soil samples

Sand

Clay

Silt

AECC

OC

FC

pH

EC

N

P

K

Fe

Mn

Cu

Zn

Br

Mg

Na

Cl

* (g/100 g soil)

(dS/m)

(mg/kg)

  

‘RS-ZM1’

36.85

20.45

42.70

6.38

1.12

23.28

8.12

2.89

0.84

12.37

402.31

6.51

8.92

1.34

0.82

0.10

5.62

5.79

9.32

‘RS-SS2’

38.42

28.91

32.60

4.37

0.62

21.08

7.68

1.45

0.21

4.37

306.24

2.34

4.76

0.58

0.27

0.03

4.38

2.75

4.21

‘RS-TT2’

44.82

25.94

29.20

4.38

0.73

20.16

7.72

1.57

0.63

7.92

256.35

3.24

3.73

0.42

0.31

0.08

6.81

4.16

1.82

‘RS-Haward’

41.82

25.31

32.87

5.46

0.94

22.11

7.64

2.05

0.42

8.40

336.58

4.48

6.70

0.98

0.44

0.09

3.85

3.46

5.15

‘RS-TT1’

37.18

34.61

28.20

4.68

0.71

20.13

7.62

1.43

0.57

11.03

284.39

5.91

4.52

0.61

0.57

0.10

4.69

2.15

4.37

‘RS-Chandler’

35.62

34.63

29.70

6.72

1.24

24.38

8.12

2.27

2.37

14.38

367.42

8.37

7.91

0.92

1.13

0.14

5.39

4.61

9.37

  1. AECC active equivalent calcium carbonate, OC organic carbon, FC field capacity, pH acidity of soil, EC electrical conductivity.
  2. *Each measurement is the mean of three replications. All of the nutrients were measured as the absorbable form.
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