How Vridhi AI Gives Fertilizer Recommendations
Most fertilizer advice reaches a farmer in kilograms of nitrogen, phosphorus and potash. Nobody buys nitrogen. They buy a bag of urea. Vridhi AI closes that gap: you tell it your crop and how much land you have, and it answers in bags.
What you enter
Two things. Your crop — wheat, rice, sugarcane, maize, cotton, potato, tomato, onion, mango or apple — and your land size. Land can be entered in acres, hectares, bighas or kanals, because a farmer in Punjab and a farmer in Bihar do not measure their fields the same way.
The maths, in plain terms
Every crop has a recommended nutrient requirement per acre. Wheat, for example, needs roughly 120 kg of nitrogen, 60 kg of phosphorus and 40 kg of potash per acre; sugarcane needs far more. Vridhi AI multiplies that by your land size, then works backwards into the products actually sold in the market:
- Urea is about 46% nitrogen
- DAP is about 18% nitrogen and 46% phosphorus
- MOP is about 60% potash
Because DAP also carries nitrogen, the app subtracts that before calculating urea — otherwise you would buy more urea than you need and burn the crop. The result is shown as whole bags of 50 kg, with the kilograms beside them.
Split the urea, do not dump it
Vridhi AI always says to give urea in two or three doses rather than all at once. Urea applied in one go is largely lost to the air and to water, which means money spent for nothing and a crop that grows leafy and weak. The crop calendar in the app reminds you when each dose is due, counted from your sowing date.
Why it still tells you to test your soil
These are general recommendations for the crop, not a reading of your field. Two neighbouring fields can need very different amounts depending on what grew there last year, how much manure went in, and what the soil already holds. Vridhi AI says this plainly every time it shows a number, and points you to your Krishi Vigyan Kendra, where soil testing is free or nearly free. An app that pretends to know your soil without testing it is guessing with your money.