Fertilizers are obtained artificially on commercial basis. It is a chemical which contains the nutrients required for the crop to grow. Fertilizers supply various nutrients as they are nutrient specific e.g.-urea provides nitrogen. Mixed fertilizer provides any two mixture of nutrients. They are expensive but their use yield large production hence are a factor of high cost farming.

Excessive use of fertilizers are not advisable as:

(a) It leads to soil and water pollution.

(b) It can destroy the fertility of soil. As the soil is not replenished, micro-organisms in the soil are harmed by fertilizers.