Nutrient composition and physiological advantages
- Ammoniacal nitrogen (12%): Provides immediately available nitrogen that promotes early vegetative establishment without leaf scorching.
- Water-soluble phosphate (61%): Exceptional high-phosphate concentration that accelerates root elongation, lateral feeder root proliferation, and energy transfer (ATP synthesis).
- Acidic pH (4.0 to 4.5): Naturally lowers spray tank and soil rhizosphere pH, enhancing the availability of micronutrients like zinc, iron, and boron.
Ideal crop stages and drip fertigation scheduling
12:61:00 is recommended during two critical crop stages: first during the early vegetative and root development stage (transplanting to 30 days), and second during the flower bud differentiation stage to stimulate robust floral primordial emergence. It is widely used in tomato, capsicum, chili, grapes, pomegranate, banana, and potato.
Solubility and tank-mixing precautions
Dissolves completely in water without leaving insoluble grit that clogs drip emitters. Never mix 12:61:00 with calcium nitrate or magnesium sulphate fertilizers in the same tank, as high phosphate reacts with calcium to form insoluble calcium phosphate precipitate. Always observe recommended fertigation dosages.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Department of Fertilizers, Government of India ↗Related on KisanPe
Common questions
What is the chemical name of 12:61:00 fertilizer?
12:61:00 is chemically Mono Ammonium Phosphate (MAP), a completely water-soluble starter fertilizer.
Why is 12:61:00 called a root booster fertilizer?
Its 61% water-soluble phosphorus content drives rapid root cell division, deep taproot elongation, and extensive feeder root proliferation.
Can 12:61:00 be mixed with calcium nitrate in the same fertigation tank?
No, mixing phosphate fertilizers with calcium fertilizers causes insoluble calcium phosphate precipitation, clogging drip lines.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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