What precautions can a gardener take so that chemical fertilizers stimulate plant growth without damaging plant roots when the concentration is too high?

Dilution and supplemental irrigation are precautions that a gardener can take so that chemical fertilizers stimulate plant growth without damaging plant roots when the concentration is too high.

Specifically, a too high concentration can be corrected by diluting the fertilizer to its correct concentration. A supplemental watering schedule can be put into effect. Adequate soil moisture levels help plant roots take in too highly concentrated fertilizers.