Ammonia
Nitric acid
Nitrogen
Nitrogen dioxide
Answer is Right!
Answer is Wrong!
The correct answer is A. Ammonia.
Ammonia is the most important nitrogenous fertilizer because it is the most readily available form of nitrogen for plants. It is also the most economical form of nitrogenous fertilizer.
Nitric acid is a strong acid that is used to make a variety of products, including fertilizers. However, it is not as readily available as ammonia and it is more expensive.
Nitrogen is the most abundant element in the atmosphere, but it is not in a form that plants can use. Nitrogen dioxide is a gas that is produced when nitrogen and oxygen react in the presence of heat. It is not a fertilizer and it is harmful to plants.
In conclusion, the chief source for the production of nitrogenous fertilizers is ammonia.