Question

Usable forms of nitrogen can intentionally be increased in the soil by(1 point)
Responses

planting more trees.
planting more trees.

allowing organic matter to decompose.
allowing organic matter to decompose.

planting fewer beans.
planting fewer beans.

lightning.
lightning.

Answer 1

Correct answers: allowing organic matter to decompose and lightning.

- Decomposition (mineralization) converts organic N into ammonium/nitrate that plants can use.
- Lightning fixes atmospheric N2 into reactive oxides that fall as nitrate.
- Planting fewer beans would reduce N (beans/legumes add N), and planting more trees does not reliably increase available soil N.