Element

Amount in compost (mg・kg⁻¹)

Amount in soil (mg・kg⁻¹)

Amount in irrigation water (mg・kg⁻¹)

Zinc

0.01

0.12 × 10⁻²

-

Copper

0.1 × 10⁻²

0.35 × 10⁻³

-

Lead

0.16 × 10⁻³

0.49 × 10⁻³

-

Chromium

0.22 × 10⁻²

0.13 × 10⁻³

-

Nickel

0.21 × 10⁻²

0.36 × 10⁻³

-

Magnesium

0.10

0.03

0.14 × 10⁻²

Iron

0.38

0.19

0.92 × 10⁻³

Calcium

0.15

0.26 × 10⁻²

0.21 × 10⁻²

Potassium

0.42

0.09

0.97 × 10⁻³

Sodium

0.25

0.02

0.34 × 10⁻²

Total nitrogen

1.81

1.37

-

pH

6.6

6.8

7.1