Nano Urea & Bottles to Replace Urea

Nano urea is a foliar liquid nitrogen fertiliser made of nanoscale urea particles. A small bottle — typically around 500 ml — is promoted to replace roughly one 45 kg bag of conventional urea used for top-dressing. Sprayed onto the leaves, the fine particles are absorbed directly by the crop, aiming to cut the cost and the nitrogen lost to the soil and air.

Bottles = conventional urea bags × replacement millilitres per bag ÷ bottle size. For example, if you would have used 4 bags of urea for top-dressing and one bottle (500 ml) is promoted to replace one bag, you need 4 × 500 ÷ 500 = 4 bottles. Enter your own bags, replacement ml and bottle size and the tool does the maths instantly.

No — it is best treated as a foliar top-up, not a total substitute. The standard recommendation is to keep a reduced basal urea (or other nitrogen) dose at sowing and use nano urea to replace the top-dressing splits. Relying on foliar nitrogen alone usually under-feeds the crop, especially heavy feeders like cereals.

Apply it as a foliar spray at active vegetative growth and again before flowering — the stages when the crop is building canopy and grain and can take up nitrogen fastest. Spray in the cool of early morning or late evening on dry foliage, avoiding the hottest part of the day and rain within a few hours.

Nano urea is usually mixed at about 2–4 ml per litre of water. The tool converts your total bottle volume into the total spray solution and the number of knapsack or power-sprayer tanks that means, so you know how much water to carry and how many fills the job will take.

A bottle is cheaper and far lighter to carry than a bag of urea, and because the nitrogen goes onto the leaf rather than the soil, less is lost to leaching, runoff and volatilisation. Pairing a reduced basal dose with a nano urea foliar top-up can trim the total urea bill while keeping the crop fed.

It is generally compatible with many common agrochemicals and micronutrient sprays, but always do a small jar compatibility test first and follow the label. Avoid mixing with strongly alkaline products. A non-ionic surfactant or the spread already in the product helps the droplets stick and spread on the leaf.

Yes — the calculation is just a conversion, so it works for cereals, vegetables, pulses or cash crops. Decide your conventional urea plan first (bags for the area in acres, hectares, bigha or guntha), then this tool tells you the equivalent nano urea bottles and spray volume.

They are solid planning figures based on the replacement rate you enter. Real nitrogen response depends on crop, stage, soil fertility, spray coverage and weather, and the official replacement claim varies by product and region. Use a reduced basal dose, watch the crop, and adjust — this is for planning, not a guarantee of yield.

Neem-coated urea is still soil-applied granular urea, slowed by a neem coating to reduce losses; nano urea is a foliar liquid sprayed on leaves. They tackle nitrogen-use efficiency differently — see the Neem-Coated Urea Saving calculator to compare the savings from each approach.