Why does the fact that americans are using less fertilizer not indicate a decline in american farming?

The decrease in fertilizer use does not mean that there is a decrease in agricultural production in America. On the contrary, there could be an increase in production even using fewer fertilizers.

The reason is simple, THE TECHNOLOGY.

Explanation:

Currently there are many new methods to save fertilizer products in the field and make crops more efficient. This is called precision agriculture.

With these methods, for example, images taken with drones or satellites (with multispectral or hyperspectral cameras) can be used to assess the status of a crop, the lack of nutrients from the soil, and even if there are pests or diseases on the plats; All this allows the farmer to apply the fertilizer or other products, only in the area that presents the problem and not in the entire crop.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it