From: Associations between housing and management factors and reproductive performance in 327 Norwegian sheep flocks
Lambs born per pregnant ewe
Number of flocks
Mean
SE
P
Sheep husbandry – total production
Sheep the only production
211
4.29
0.21
a
Sheep and other animal production
52
5.29
0.42
b
Other production most important
63
5.21
0-38