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The subject of investigation were 3940 buffaloes from the Murrah breed, raised at the dairy farm of Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana for the period 1971-2010 to study the culling pattern in them from an organized herd. The reasons for culling were classified into: low milk production; reproduction related problems; health type; disease; senility and miscellaneous conditions. The part of buffaloes culled for low milk production was the biggest - 30.77 %, followed by reproduction related problems -30.39%, old age-14.76%, disease -9.64%, health type -8.89% and miscellaneous condition accounted for 5.55 % and it was found that culling has significant effect on period, season and parity (p < 0.05). [ABSTRACT FROM AUTHOR]

This article discusses a study which investigated the effect of body weight at calving and body weight changes during lactation on milk composition. Several buffaloes served as subjects in this study. A Milk-O-Tester was used to test the fat percentage of each sample. Lactation number, month of lactation and stage of pregnancy are some of the factors considered in the statistical analysis of data on milk constituents. Results of the study showed that higher first lactation milk yield was associated with buffaloes having higher body weight. Particular focus is given to the order of ranking of first lactation 305 days milk production for buffaloes with a variety of body weight changes. The study also found a negative relationship between body weight and fat percentage.

The article presents a study which examines the performance of crossbred cattle under field conditions. This study was conducted to monitor the performance of crossbred cattle born under Field Progeny Testing program at Kerala Agricultural University, Trichur (KAU) and Punjab Agricultural University, Ludhiana (PAU) field units in India from young bulls having 50-75 percent exotic inheritance in various sets. Researchers found that the effect of year and season of calving had significant impact on first lactation milk yield.