The data pertaining to milk production traits for thepresent investigation were collected from the historycum pedigree sheets, production records maintained atthe Dairy Farm of GADVASU, Ludhiana under the“Network project on buffalo breeding” with the mainobjective to study the effect of non genetic factors onmilk production and its composition. The data withrespect to this objective was collected over a period offive years i.e. from 2004-2008.