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Published online by Cambridge University Press: 24 November 2017
There is increasing interest in the development of later lambing systems for crossbred ewes which more closely match ewe nutritional requirements with grass growth (Stone, 1988). Lambing a proportion of the flock during summer potentially ensures a better continuity of lamb supply. The objectives of the present trial were:
(i) to compare the growth performance of spring and summer born lambs grazing swards fertilised with a high level of nitrogen or oversown with clover and receiving no fertilizer nitrogen.
(ii) to investigate relative declines in midseason growth rates.