Nutrient Composition and High-Phosphate Science
Mono Ammonium Phosphate supplies phosphorus in a fully water-soluble orthophosphate form (H2PO4-) alongside ammoniacal nitrogen. Ammoniacal nitrogen lowers root-zone pH slightly, enhancing the solubility and uptake of phosphorus, iron, and zinc in alkaline soils.
Being completely free of sodium and chloride, it provides safe starter nutrition for salinity-sensitive seedlings and horticultural transplants.
- 12% Ammoniacal Nitrogen: Provides gentle starter nitrogen that promotes early vegetative shoot development without causing excessive vegetative surge.
- 61% Phosphate (P2O5): High-potency phosphorus that fuels early root branching, energy transfer (ATP), and flower primordia initiation.
- Acidifying effect: Moderately lowers root rhizosphere pH, improving micronutrient availability in calcareous soils.
- Zero chloride & sodium: Safe for precision fertigation in greenhouse crops, open-field vegetables, and fruit orchards.
Fertigation Application and Tank Compatibility
MAP 12-61-0 dissolves cleanly and rapidly in irrigation water, leaving zero residue to clog drip emitters.
Applying during seedling establishment and early vegetative growth establishes a vigorous root architecture.
- Drip fertigation: Inject 2 to 4 kg per acre per fertigation cycle during early rooting and flower bud differentiation.
- Foliar spray: Dissolve 4 to 5 grams per liter of water (0.4% to 0.5% concentration) and spray during cool morning hours.
- Tank mixing caution: Do not mix directly with calcium nitrate or magnesium sulfate in the same concentrated stock tank to prevent insoluble precipitation.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Department of Fertilizers ↗Related on KisanPe
Common questions
What nutrients are supplied by 12-61-0 fertilizer?
It supplies 12% Ammoniacal Nitrogen and 61% water-soluble Phosphate (as P2O5), with zero potash.
Why is 12-61-0 (MAP) considered the best starter fertilizer?
Its exceptionally high water-soluble phosphorus content stimulates rapid seedling root branching and early establishment.
Can 12-61-0 fertilizer be mixed with calcium nitrate?
No, mixing concentrated phosphate with calcium causes insoluble calcium phosphate precipitation that clogs drip lines.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More Fertilizers & Crop Nutrition guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.