Table 1 Physical and chemical properties of the sunflower soils

OM (%)

1.98 ± 0.0^bc

2.11 ± 0.1^b

1.78 ± 0.1^c

2.81 ± 0.0^a

N-NO₃ (mg/kg)

12.31 ± 2.8^ab

13.27 ± 0.2^a

5.54 ± 2.5^bc

4.30 ± 0.0 ^c

N-NH₄ (mg/kg)

4.93 ± 0.2^c

4.59 ± 0.1^c

6.67 ± 0.1^b

11.79 ± 0.1^a

pH

6.61 ± 0.1^a

6.69 ± 0.0 ^a

6.02 ± 0.1^b

6.05 ± 0.0 ^b

Res.(ohm)

1270 ± 3.0^b

1230 ± 30.0^b

2275 ± 155.0^a

2020 ± 20.0^a

P³⁻ (mg/kg)

68.50 ± 8.8^a

81.29 ± 2.6^a

14.09 ± 1.2^b

79.84 ± 3^.0^a

Ca²⁺ (mg/kg)

560.50 ± 81.0^ab

659.50 ± 14.5^a

451.50 ± 3.5^b

651.00 ± 17.0^a

Mg²⁺ (mg/kg)

141.00 ± 3.0^a

138.50 ± 3.5^a

152.00 ± 8.0^a

135.50 ± 3.5^a

K⁺ (mg/kg)

161.50 ± 0.5^a

169.00 ± 3.0^a

119.00 ± 7.0^b

167.00 ± 1.0^a

Na⁺ (mg/kg)

78.70 ± 1.9^a

71.40 ± 3.4^a

71.95 ± 2.4^a

70.35 ± 3.4^a

C (%)

0.46 ± 0.0^b

0.56 ± 0.1^b

0.46 ± 0.0^b

1.06 ± 0.1^a

N³⁻ (%)

0.05 ± 0.0^b

0.05 ± 0.0^b

0.05 ± 0.0^b

0.09 ± 0.0^a

Sand (%)

78.00 ± 0.0^b

78.00 ± 0.0^b

79.00 ± 1.0^b

84.00 ± 0.0^a

Silt (%)

2.00 ± 0.0 ^a

3.00 ± 1.0 ^a

2.00 ± 0.0 ^a

3.00 ± 1.0 ^a

Clay (%)

20.00 ± 0.0^a

19.00 ± 1.0^a

19.00 ± 1.0^a

13.00 ± 1.0^b