Question

Farmers add fertilizers that contain nitrogen and phosphorus to their crops. Why don't they add carbon as well?

Answer 1

Because green plants are capable of fixing atmospheric carbon, and converting it to simple sugars.

Explanation:

So two questions:

`(i)` What is the process of carbon fixation called?

`(ii)` In what form is the atmospheric carbon?

Note that farmers and gardeners regularly add organic matter to their soils to improve drainage etc and to condition the soil.