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Table 1 Pre-experimental biochar and irrigation characteristics

From: Modulation of sunflower growth via regulation of antioxidants, oil content and gas exchange by arbuscular mycorrhizal fungi and quantum dot biochar under chromium stress

Soil

Values

Biochar

Values

Irrigation

Values

pH

8.63

pH

8.45

pH

6.75

ECe (dS/m)

3.69

ECe (dS/m)

4.35

EC (µS/cm)

205

SOC (%)

0.55

Volatile Matter (%)

18.00

Carbonates (meq./L)

0.00

TN (%)

0.032

Ash Content (%)

33.00

Bicarbonates (meq./L)

6.12

AK (mg/kg)

121

Fixed carbon (%)

49.00

Chloride (meq./L)

0.15

EP (mg/kg)

4.23

TN (%)

0.15

Ca + Mg (meq./L)

4.00

Sand (%)

25.00

TK (%)

1.41

Sodium (mg/L)

199.00

Silt (%)

40.00

TP (%)

0.65

TN = Total Nitrogen

EP = Extractable Phosphorus

AK = Available Potassium

CEC = Cation Exchange Capacity

EC = Electrical Conductivity

Clay (%)

35.00

Surface area (m²/g)

350

Texture

Clay Loam

CEC (meq./100 g)

411