Question

How do green plants take up nitrogen from the soil?

Answer 1

The answer can be written as follows:

Explanation:

• The plants have the ability to take up nitrogen from the soil in the form of nitrates.
• When water is absorbed by the roots, nitrogen in the form of nitrates is absorbed and taken up by the plants.
• The nitrogen is however, recycled back into the earth and the process is termed as the nitrogen cycle.

Answer 2

Explanation:

Plants absorb nitrogen from the soil as both NH₄⁺ and NO₃⁻ ions, but because nitrification is so pervasive in agricultural soils, most of the nitrogen is taken up as nitrate. Nitrate moves freely toward plant roots as they absorb water.