India with world second largest population is always under pressure on food security. Fertilizer plays a key role in ensuring agriculture productivity ensuring to face challenges in terms of shrinking cultivable land. Indian agriculture needs 16 elements in larger measure and 7 elements in micro measures. The first are classified as primary nutrients viz . sodium, potassium, phosphorous, nitrogen etc., These nutrients are essential to make the soil fertile and to overcome any deficiency. Some chemical fertilizers used are ammonium sulphate, calcium ammonium nitrate etc., Even a deficiency in micro nutrients will affect the absorption of primary nutrients. Iron, zinc, manganese, copper, boron, molybdenum and chlorine are a group of ‘micronutrients’ which are required by the plants in small quantities. Intensive cropping deplete all nutrients including micronutrients from the soil at a fast rate. Therefore selective use of micronutrients is necessary for increasing agricultural production.
India has 56 large fertilizer units which produce a wide range of nitrogenous and phosphates/ complex fertilizers. Of these, 30 units produce urea; 21 units produce DAP and complex fertilizers; 5 units produce low analysis straight nitrogenous fertilizers; and 9 units produce ammonium sulphate as a by-product.
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List of Fertilizer Companies in India

Agri Search India Pvt Ltd

Agri Tech India Ltd

Agrico Organics Ltd

Agrigold Organics Pvt Ltd

Agriland Biotech Ltd

Agro Biotech Research Centre Ltd

Agro Manures Chemicals India Pvt Ltd

Agro Nutrients Pvt Ltd

Agro Phos India Ltd