title: Disposal rate in different age groups of Karan Fries (Crossbred) males in organized herd.
abstract: OBJECTIVE
  The present study was carried out to analyze the disposal rate in different age groups of Karan Fries (KF) males in National Dairy Research Institute herd.
  
  
  METHODS
  Records on 1740 KF crossbred bulls born during the period 1997-2012 were collected with an objective to ascertain the effect of genetic and non-genetic (Period of birth and season of birth) factors on the disposal pattern of KF males. The percent of animals disposed from the herd due to mortality and culling was calculated by proportion using descriptive statistics. The data were subjected to Chi-square test to test the difference due to different factors.
  
  
  RESULTS
  Overall disposal rate for the different age groups of 0-1 m, 1-2 m, 2-3 m, 3-6 m, 6-18 m, 18 m-3 year and 3-5 year were calculated as 17.9, 16.3, 14.2, 25.8, 49.0, 37.6 and 51.65%, respectively. In the age groups, 3-6 m, 6-18 m and 3-5 year, effect of periods of birth were found to be statistically significant (p<0.01) for overall disposal rate. Across different seasons of birth, overall disposal rates differed significantly (p<0.01) in different age group except in 3-5 year age group. Differences in overall disposal rate due to genetic group were statistically significant (p<0.01) in 1-2 m, 2-3 m, 3-6 m, 6-18 m, 18-3 year and 3-5 year age groups.
  
  
  CONCLUSIONS
  Overview of the results indicated that higher overall disposal rate in age group of 1 month was due to mortality while, in the age groups of >1 month, culling was the primary cause.
authors.affiliation: Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India.
authors.forename: Achun
authors.initials: A
authors.lastname: Panmei
authors.affiliation: Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Gupta
authors.affiliation: Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India.
authors.forename: P R
authors.initials: PR
authors.lastname: Shivahre
authors.affiliation: Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India.
authors.forename: M
authors.initials: M
authors.lastname: Bhakat
authors.affiliation: Dairy Cattle Breeding Division, National Dairy Research Institute, Karnal, India.
authors.forename: K Mahesh
authors.initials: KM
authors.lastname: Singh
keywords: culling; disposal; karan fries male; mortality; organized herd