TY - BOOK AU - MADAN Lal TI - Comparison of different measures of part-year egg production in chickens U1 - T 636.514 M25C PY - 1975/// CY - Ludhiana PB - P.A.U KW - POULTRY KW - BREEDING KW - EGG PRODUCTION KW - EGGS -- PRODUCTION N2 - The investigations were conducted at Punjab Agricultural University, Ludhiana on White Leghorn pullets to compare the relative efficiencies of selection of different measures of part-year egg production viz, first 100-day egg production, egg production up ER -