The goal of the study was to ascertain if supplementing Tsara (Pterocarpus lucens) and Pigeon pea (Cajanus cajan) leaves would be more cost-effective than a concentrate mixture when fed to Begait sheep in the Tselemti District of the North Western zone of Tigray, Northern Ethiopia, on a basal diet of hay. Twenty-five yearling male Begait sheep are used in the experiment. Five dietary treatments are set up in a randomized complete block design (RCBD): Tsara leaves (T2), Pigeon pea leaves (T3), a combination of Tsara and Pigeon pea leaves (T4), and concentrate mixture (T5). The dietary treatments are given either as hay alone (T1) or in addition to it. The study compared the net income and marginal rate of return (MRR) of several feed supplementation strategies using a partial budget analysis. The partial budget analysis's findings showed that the concentrate mixture supplementation of Begait sheep (T5) produced the highest net income per head. This was followed by Tsara leaves (T2), Pigeon pea leaves (T3), mixture of Tsara and Pigeon pea leaves (T4) and the non-supplemented group (T1). The concentrate mixture's net income was 375.99 Ethiopian Birr (ETB), whereas the leaves of tsara, pigeon pea, and tsara-pea mixtures totaled 308.3 ETB, 236.72 ETB, and 246.59 ETB, respectively. On the other hand, hay alone brought in 198.3 birr in net income. Additionally, the study of the marginal rate of return (MRR) showed that the concentrate mixture (109%), pigeon pea leaves (92%), and the combination of pigeon pea and tsara leaves (67%) had the highest MRRs, with tsara leaves having the highest MRR of 110%. It is advised, in light of the results, that sheep farmers in the Tselemti District think about supplementing with Tsara leaves and the concentrate mixture in order to achieve financially viable returns. In places where the concentrate mixture is not easily accessible, pigeon pea leaves and a combination of tsara and pigeon pea leaves can be utilized as substitute feed sources. To validate these results and maximize the use of these feed supplies in the local environment, more study and on-farm trials are advised.

Keywords: Tsara, Pigeon pea leaves, concentrate mixture, Begait sheep, hay basal diet, economic advantage, Tigray Region, Ethiopia.