In organic farming, a source of extra nitrogen added to soils as fertilizer comes from:
A) nitrogen gas from the atmosphere.
B) natural gas.
C) anhydrous ammonia.
D) decomposed manure.

Question

Quizplus · Accepted Answer

Decomposed manure is a common organic fertilizer that adds extra nitrogen to the soil, aligning with the principles of organic farming by using natural, decomposed organic matter rather than synthetic chemicals.

In Organic Farming, a Source of Extra Nitrogen Added to Soils