Table 2 Initial characteristics of the soil used for the germination experiment in trays 0–10 and 20–40 cm.

Granulometric composition

0–10

20–40

Coarse sand (g/kg)

370

362

Thin sand (g/kg)

307

323

Silt (g/kg)

209

190

Clay (g/kg)

109

125

Natural clay (g/kg)

52

60

Degree of flocculation (g/100 g)

50

52

Global density (g/cm³)

1.21

1.19

Particle density (g/cm³)

2.47

2.52

Ph

7.4

7.5

C.E (dS/m)

2.29

1.83

Assortment complex

Ca²⁺ (cmol_c/kg)

14.00

13.10

Mg²⁺ (cmol_c/kg)

2.70

2.40

Na⁺ (cmol_c/kg)

0.90

0.75

K⁺ (cmol_c/kg)

3.35

2.80

H⁺ + Al³⁺ (cmol_c/kg)

1.10

1.15

Al³⁺ (cmol_c/kg)

0

0

S (cmol_c/kg)

21.7

19.0

T (cmol_c/kg)

22.7

20.2

V (%)

96

94

PST

4

4

C (g/kg)

29.20

26.40

N (g/kg)

3.28

2.76

C/N

9

10

OM (g/kg)

50.08

40.51

Assimilable P (mg/kg)

497

451