How it works
A recommendation such as 120:60:40 means 120 kg of nitrogen, 60 kg of phosphorus (as P2O5) and 40 kg of potassium (as K2O) per hectare over the season, usually split across stages.
Nitrogen drives leaf growth, phosphorus supports roots and flowering, and potassium supports water regulation, fruit quality and disease resistance.
Why it matters for Indian farmers
Too little of any nutrient caps yield; too much wastes money and can harm the crop and the soil. A soil test, the Soil Health Card and your state agricultural university's recommendation are the right starting point.
How VarshaKrishi uses it
VarshaKrishi does not recommend fertiliser doses on the free Watch plan. Its crop guides list typical NPK ratios for reference, and a field that falls behind the rest in greenness is flagged so the farmer can check whether nutrients are the cause.
Questions about NPK ratio
How do I know my field's NPK needs?
Get a soil test (the Soil Health Card scheme provides one) and follow your state agricultural university's or KVK's recommendation for your crop.
Can a satellite tell if my crop needs nitrogen?
It can show that part of the field is less green than expected, which may be nitrogen shortage, but it cannot confirm the cause. Check the field or ask an agronomist.
Which NPK ratio is right for citrus?
It depends on your soil test, the age of the trees and the bahar. Follow the recommendation of your state agricultural university or KVK; a soil test is the starting point.