Major straight and complex chemical fertilizers
Mineral fertilizers provide concentrated doses of primary macronutrients—Nitrogen (N), Phosphorus (P), and Potassium (K)—vital for plant vegetative and reproductive development.
Indian cultivators utilize straight fertilizers supplying a single primary nutrient as well as multi-nutrient complex grades manufactured under statutory specifications.
- Urea (46% N): The most widely applied nitrogenous fertilizer, promoting rapid vegetative growth and leaf greening.
- DAP - Di-Ammonium Phosphate (18-46-0): Supplies basal nitrogen and high water-soluble phosphorus for vigorous root establishment.
- MOP - Muriate of Potash (0-0-60): The primary potassium source, boosting grain filling, disease resistance, and stem strength.
- Complex NPK Grades: Formulations like 10-26-26, 12-32-16, and 20-20-0-13 supplying balanced nutrition in a single granule.
- SSP - Single Super Phosphate (16% P2O5, 11% S, 19% Ca): Affordable source of phosphorus, sulphur, and calcium for oilseeds and pulses.
Secondary nutrients, micronutrients, and water-soluble grades
Intensive multi-cropping has depleted Indian soils of secondary elements and essential micronutrients, requiring targeted supplementation.
Water-soluble specialty grades allow precision fertigation through drip lines and rapid correction of foliar deficiencies.
- Zinc Sulphate (21% and 33% Zn): Prevents khaira disease in paddy and white bud in maize.
- Ferrous Sulphate & Borax: Corrects iron chlorosis in calcareous soils and boron deficiency in fruit setting.
- Water-Soluble NPKs: High-purity 19-19-19, 12-61-00 (MAP), 00-52-34 (MKP), and 00-00-50 (SOP) for drip fertigation and foliar feeding.
Organic manures and living bio-fertilizers
Sustainable agriculture integrates chemical fertilizers with organic amendments and living microbial inoculants to restore soil organic carbon.
Bio-fertilizers fix atmospheric nitrogen, solubilize fixed soil phosphorus, and mobilize soil potassium naturally.
- Organic manures: Farmyard manure (FYM), vermicompost, and poultry manure improving soil moisture retention and microbial activity.
- Nitrogen-fixing bio-fertilizers: Rhizobium for leguminous pulses, Azotobacter for non-legumes, and Azospirillum for cereals.
- Phosphate solubilizers: Phosphate Solubilizing Bacteria (PSB) converting insoluble soil phosphorus into plant-absorbable orthophosphate ions.
Official source
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Common questions
What are the three primary nutrients supplied by chemical fertilizers?
The three primary macronutrients are Nitrogen (N), Phosphorus (P), and Potassium (K).
What is the difference between straight and complex fertilizers?
Straight fertilizers (like Urea or MOP) supply only one primary nutrient, whereas complex fertilizers (like 12-32-16) supply two or three primary nutrients together.
How do bio-fertilizers benefit agricultural soil?
Bio-fertilizers contain living beneficial microbes that fix atmospheric nitrogen, solubilize fixed soil phosphorus, and enhance root health naturally.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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