కాత్యాయని అమ్మోనియం సల్ఫేట్ ఎరువు 21% నత్రజని + 24% గంధకం

Ammonium sulphate is used as a nitrogen and sulphur fertilizer, supplying 21% nitrogen and 24% sulphur. It corrects nitrogen and sulphur deficiency in cereals, oilseeds, pulses, vegetables and fruit crops, and is especially suited to alkaline and calcareous soils.

A 50 kg bag of standard ammonium sulphate costs roughly ₹600 to ₹1,400 in India, because it is a subsidised fertilizer sold through the retail and cooperative channel. Branded small-pack ammonium sulphate for foliar and drip use is priced much higher per kg.

In agriculture, ammonium sulphate is used for basal and top-dress nitrogen, for correcting sulphur deficiency in mustard, groundnut and onion, for lowering pH in alkaline soils, in drip fertigation, and as a spray adjuvant that counters hard water in herbicide tanks.

Apply ammonium sulphate as a basal dose at sowing or transplanting, and as a top dressing during active vegetative growth. In sulphur-hungry crops like mustard, groundnut and onion, apply before flowering. Always apply to moist soil and irrigate lightly afterwards.

Yes. Ammonium sulphate dissolves readily in water at roughly 750 g per litre, which makes it suitable for foliar spray, drip fertigation and spray-tank adjuvant use. Dissolve it in a part-filled bucket first, stir until clear, then add to the tank.

Branded 1 kg packs of ammonium sulphate cost roughly ₹380 to ₹450 in India. Katyayani Ammonium Sulphate is ₹399 per kg on katyayanikrishidirect.com. Unbranded commodity ammonium sulphate bought as a 50 kg bag works out far cheaper per kg.

Commodity ammonium sulphate in a 25 kg quantity costs roughly ₹300 to ₹700 in India at prevailing subsidised bag rates. Katyayani's branded 25 kg pack is ₹6,157, reflecting small-pack, direct-delivery pricing rather than the bulk commodity rate.

In soil, ammonium sulphate releases nitrogen within days and its effect lasts roughly four to six weeks, so split applications work better than one large dose. In storage it lasts indefinitely if kept dry and sealed, as it absorbs moisture and cakes.

Neither is universally better. Urea is cheaper per kg of nitrogen at 46% N. Ammonium sulphate gives 21% N plus 24% sulphur, resists ammonia volatilisation better on surface application, and suits alkaline soils. Choose ammonium sulphate when your soil is sulphur-deficient or alkaline.

Urea is called the king of fertilizers because it carries 46% nitrogen, the highest of any solid nitrogen fertilizer, and is the most widely used fertilizer in India. Ammonium sulphate is not the king, but it supplies sulphur that urea does not.

Ammonium sulphate is also called sulphate of ammonia, abbreviated SOA or AmSul in the trade. Its chemical formula is (NH₄)₂SO₄ and its natural mineral form is mascagnite. In India it is commonly written as अमोनियम सल्फेट or ammonium sulfate.

The main use for ammonium sulphate is as a nitrogen fertilizer that also supplies sulphur. It is the preferred nitrogen source on alkaline and calcareous soils and for sulphur-responsive crops such as mustard, groundnut, onion, garlic and tea.