Let's talk about traditional fertilizers.
Most traditional fertilizers are synthetically made, which means that their composition is designed from the ground up. This means that all the nutrients and minerals needed for plant growth are sourced from the earth in the cheapest way possible, in order to produce bulk to supply the masses.
Common fertilizers are built up from various chemicals. Some of these chemicals, like potassium and phosphorous, are extracted from the earth in vast scale mining processes. On the photo of the artificial mountain and turquoise lake, a potassium mining site can be seen to get a perspective on the scale of these activities. This is just one out of many mines for the fertilizer industry.