The study was conducted in Hayolom sub-district, in the Northern Ethiopian highlands (Figure 1), in Hawzen district located at about 75km from Mekelle, capital city of Tigray regional state of Ethiopia. The mean, minimum and maximum annual rain fall of the district is 580 and 750 mm respectively and the temperature ranges between 14 and 27°C. The total human population is 117,338 (56,616 males and 60722 females). Agriculture is the main economic source of the community. About 95% of the population of the district depends on agriculture practicing mixed farming, livestock husbandry and crop production simultaneously.