nonreturn rate

nonreturn rate

the proportion of cows not seen to come back into estrus within a specified period after breeding, and are thus considered to be pregnant. They can also be classified as 28, 35, 60 or 90 day nonreturns depending on the interval since mating that is specified.
References in periodicals archive ?
Effect of heat stress on nonreturn rate in Holsteins: fixed-model analyses.
The nonreturn rates for autopsy slides and blocks were 16% and 36%, respectively.
National data show that more than 14 percent of new community college students leave college after their first semester, while studies in Florida and among Achieving the Dream participant colleges found second-semester, nonreturn rates of 25 percent and 30 percent, respectively.
22) Beverage container litter rates could fall by a greater percentage than the fall in nonreturn rates because of the scavenger value of this litter.