Cotton, the ‘silver gold ‘ is solitary source of raw material for Pakistan textile industry. Rapid replacement of locally cultivated cotton varieties with Bt-cotton demands the revision of production technologies including fertilizer recommendations; because mostly the seed of Bt cotton varieties being adopted is imported without assessment of the soil and climatic suitability for these varieties locally. A newly evoleved most promising cotton variety Sindh-1 was evaluated against various fertilizer levels (136-68-68 kg: 20% >RDF [recommended dose of fertilizers]; 124-62-62 kg: 10% >RDF; 112-56-56 kg: RDF; 100-50-50 kg: 10% <RDF; 88-44-44 kg ha^-1: 20% <RDF) to optimize its NPK requirement. The results showed that 124-62-62 kg ha^-1 NPK (10% >RDF) produced most promising agronomic performance than RDF (112-56-56 kg). It indicates that the soils have become more deficient of essentially required elements and existing RDF (NPK 112-56-56 kg ha^-1) is no more economically viable rate and needs to be revised upto 124-62-62 kg ha^-1. The farmers may be advised for adoption of promising local cotton variety Sindh-1 which is not only high yielding, but also more responsive to NPK fertilizers as compared to other cotton varieties under cultivation.

KEYWORDS: Cotton, variety Sindh-1, NPK, growth, lint yield and quality and oil content