NPK 12:32:16 (complex)
A ready basal blend heavy on phosphorus — the convenience of DAP and MOP in one bag, placed at sowing.
- Composition
- 12% N, 32% P₂O₅, 16% K₂O
- Form
- Granular complex
- Subsidised price
- ~₹1,400–1,500 per 50 kg bag (2024–25)
- Best for
- Basal at sowing (P + K crops)
Overview
NPK 12:32:16 is a granular complex carrying 12% nitrogen, 32% phosphorus and 16% potassium in every granule. Its high phosphorus and useful potassium make it a popular single-bag basal for crops that need both at sowing — potato, cotton, oilseeds and maize — saving you from spreading separate DAP and MOP.
Like all complexes it is a basal, not a top dressing: the phosphorus will not move to the roots if applied late. Because the three nutrients are fixed in one ratio, it fits best where that ratio matches the crop and soil test — otherwise a straight-fertiliser mix tuned to your Soil Health Card can be cheaper and more precise.
What it is and when to reach for it
- A high-phosphorus basal complex — reach for it at sowing on crops that need phosphorus and potassium together, like potato, cotton and oilseeds.
- One bag replaces separate DAP and MOP, which saves labour and a second spreading pass.
- It carries only 12% nitrogen, so plan to top-dress the rest of the crop’s nitrogen as urea later.
How to apply it well
- Apply the full dose at sowing as basal, placed in the furrow near the seed like any phosphorus fertiliser.
- Match the grade to a soil test — 12:32:16 suits fields that need a phosphorus-and-potassium lead; a different grade may fit better where potassium is already high.
- Follow up with split urea top dressings for the nitrogen this complex does not fully supply.
Common mistakes
- Using it as a top dressing — the phosphorus is wasted because it will not reach the roots.
- Assuming the built-in ratio suits every field — where it does not, straights tuned to a soil test cost less per nutrient.
- Forgetting to add urea and leaving the crop short of nitrogen mid-season.
Organic alternative
Compost + rock phosphate + wood ash
In organic systems, well-rotted compost with rock phosphate for phosphorus and a little wood ash for potash covers the same basal need.
Crops it is used on
Open a crop for its full nutrient schedule.
Common questions
Is 12:32:16 better than DAP?
It depends on the crop. DAP is a straight phosphorus-and-nitrogen fertiliser; 12:32:16 also brings 16% potassium, so for crops that need potash at sowing (potato, cotton) it is a convenient single-bag basal. Where the soil already has enough potassium, DAP plus a matched urea dose can be cheaper.
Can I use 12:32:16 as a top dressing?
No — like any phosphorus-carrying fertiliser it is a basal. Apply it at sowing near the seed. Phosphorus does not move to the roots when scattered on a standing crop, so a late application is largely wasted.
Which crops suit 12:32:16?
Crops that need both phosphorus and potassium at sowing — potato, cotton, oilseeds like mustard, and maize. Confirm the grade against your Soil Health Card so the fixed 12:32:16 ratio actually matches what the field needs.
Composition and doses follow ICAR / Soil Health Card guidance; prices are the notified subsidised rates for the season shown and are guidance, not a quote. A soil test for your field always beats a general rate. See our editorial policy.