Factors affecting disposal trends in crossbred cattle at closed organised farm

Karan Fries cows (1349), born during 1980 to 1991 were used to study the disposal trends. The animals died varied from 7.76 (1986) to 25.00 % (1991) and culled from 12.12 (1991) to 33.62 % (1981), over the years. Effect of age. inbreeding and year of birth was significant on disposal rate. Increase in culling and decrease in mortality rate with advances in age was evident. Inbreeding level above 6% had significantly adverse effect on culling. Maximum (6.80% of herd strength and 50% of total death) mortality was recorded up to the age of 3 months. Intestinal infections and pneumonia were the main causes and accounted for 50% oftotal loss. Maximum culling (16.54%) occurred beyond 18 months of age. Poor growth (5.56%), reproductive disorders (2.13%), poor health (1.75%), locomotive disorders (1.49%), and late maturity (1.29%) were the important causes of culling. Higher incidences pf mortality occurred during December, April, May and September because of prevailing extreme climatic conditions. The study suggests improvements in managemental measures and lowering of inbreeding to reduce the culling and mortality.