Decreasing grazing lands and low productivity of animals, coupled with irregular pattern of rainfall are the important factors affecting the profit of sheep rearing. Because of these reasons, intensive rearing and grazing with supplementation are nowadays tried by the farmers in sheep production. Chronic shortage of feed and fodder and their poor nutritive value could be tackled to some extent by way of supplementation with concentrate feed and any other feed supplements. Use of NPN substances like urea was tried to replace the costly source of proteins in ruminant diet. Urea Molasses Mineral Block (UMMB) is made by combining urea, molasses and minerals in a form that can be used for feeding of animals and it has been used successfully in cattle. Hence, this work was taken up to study the performance of Mecheri ram lambs under different systems of rearing.