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An investigation was carried out with ' F' strain of white leghorn maintained at University Poultry Farm to evaluate the production potantial based on part year performance. At the age of 18 weeks, 400 pullets were housed in 100 multiple bird cages of identical size at the rate of 4 hen. per cage at random. The production performance as well as meteorologicaI observations were studied for five 28-clay periods from 21 to 4U weeks of age. Based on hotly weight, age at sexual maturity, egg production, feed consumption and egg weight the ' F' strain was found to be a low body weight strain, with poor uniformity in pullet body weight and egg at sexual maturity.