Author(s): KG Geenty
The book addresses lambing paddock environmental effects upon lamb survival. Among these are slope. The authors identified % slope along with lambing rate and to a lessor extent breed all influencing lamb mortality on sloping ground. 0 to 24 degrees is not an issue. at 24 to 31 degrees, 4% of single births, and 12% of twin born lambs died due to rolling down the hill. at 32 to 44 degrees 34% of single born and 52% of twin born lambs died to rolling down the hill. The book went on to explain that "On steep land 82% of the ewes lambed at the top of the slope. When the results were corrected for the relative area of each class of slope, exposed ridges were the most popular site followed by the flats and slopes. Ewes may have chosen ridges to isolate themselves from unlambed ewes congregating on flat areas."