Survey observations on the reproductive performance of both romney stud and commercial flocks throughout New Zealand

摘要

Results of a series of surveys during 1965#x2013;68 to collect basic data on the reproductive perfonnance of registered Romney stud flocks totalling more than half a million ewes are given. For presentation and analysis of the data, New Zealand was divided into six geographical areas based on latitude: northern (l), central (2), and southern North Island (3)northern (4), central (5), and southern South Island (6).