What fertiliser dose does cotton need per acre (kapas)?

Cotton fertiliser must be balanced and split, not all at sowing. As a general guide for irrigated hybrid cotton, apply full phosphorus and potash plus part of the nitrogen as basal, then split the rest of nitrogen in 2 to 3 doses up to flowering, since cotton needs nitrogen most through squaring and boll development. Use a soil test to fix exact NPK because over nitrogen causes excess growth, late maturity, and more sucking pests and boll rot. Cotton commonly responds to zinc, and sometimes boron and magnesium, especially on light or depleted soils, so add micronutrients if soil test or deficiency symptoms show. Get a soil health card and follow your state university dose for your specific soil and yield target.

On boron, a little goes a long way and too much is harmful, so only add it if the soil test or a clear deficiency shows. Mixing a foliar dose of a micronutrient at squaring helped my fruit set on a depleted field, but I confirmed the rate with the KVK first instead of guessing.