That's a gross oversimplification of the issue. By using mineral fertilizer you add a big load of nitrates to the soil at once instead of slowly decomposing nit

That's a gross oversimplification of the issue. By using mineral fertilizer you add a big load of nitrates to the soil at once instead of slowly decomposing nitrates bound in organic compounds. The plants can't absorb this ok at once. This leads to a run-off into the oceans and ground-water, and also polluted the atmosphere with nitrous oxide. Finally the soil biology is negatively impacted by this. If you consider phosphor mineral fertilizer you get the problem that you add heavy metals like cadmium and uranium to soil.