Journal of Animal Production, 30 (2), 74-76, 2018 Technical Note Mineral Contents of some Macro and Micro Elements in Forages Produced on Finca Modelo Farm, Asela, Ethiopia Silvio José Martínez Sáez*; Hayelom Deribew**; Tefera Entele** * Ignacio Agramonte Loynaz University of Camagüey, Cuba ** Adama Science and Technology University (ASTU), Ethiopia silvio.martinez@reduc.edu.cu INTRODUCTION The lack of some minerals previously brought by water and soil has been caused by constant digging without supplementation. Accordingly, there is a need for adequate supplementation in order to prevent negative balances, and therefore, nutrient deficiency, which is increased over time (McDowell and Arthington, 2005). In Ethiopia, grazing animals subsist mainly on low quality foods, including some graminaceae, very few leguminosae, and harvest residues in less arid areas (Kabaija and Little, 2012). Some regions of the country are deficient in one or two minerals, such as copper in the Rift Valley re- gion. Other minerals, like sodium, phosphorous, copper, cobalt, zinc, and manganese are scarce, only found in scattered areas. Other areas have also been affected by copper, iron, and manganese toxicity (Alemu, 2012). A change in the feeding paradigms of grazing animals is critical for the sustainable development of a country. The information used to improve cultivation and production, farm management, processing, and com- mercialization techniques based on traditional approaches are goods’ shares in the short run. The public sector (universities) should be in charge of information delivery (FAO, 2017). The Asela Model Agricul- tural Enterprise (AMAE) managed by the Adama Science and Technology University (USTU) is an ex- ample of how the poorest farmers can use the resources of low-input agriculture wisely to prevent soil de- terioration. The company cultivates pastures, which can be sold as seeds or forage at reasonable prices. They include various high quality legume species, like alfalfa and clover. Constant evaluation of forage quality is important to validate these efforts. Determination of phosphorous (P), calcium (Ca), sulfur (S), magnesium (Mg), sodium (Na), potassium (K), iron (Fe), and copper (Cu) was made through the analysis of samples of graminaceae and legumino- sae cultivated at AMAE. DEVELOPMENT The reference farm is located near Asela city, 1 800 meters above sea level. The study was made at the end of the rainy season. The green forages were cut as usual, for later consumption by animals (near the stem). Triplicate samples of alfalfa (Medicago sativa), clover (Trifolium repens), common vetch (Vicia sativa L), Rhodes (Chloris gayana), elephant grass (Pennisetum purpureum), wheat stalks (Triticum aestivum), and teff (Eragrostis tef), were collected in different AMAE locations chosen at random. The total green mass collected made 5kg, which were dried in the sun for a week. The material was carried to ASTU and then cut with a stainless steel pair of scissors. The possible residues of dust or other contaminating materi- als were removed by rinsing with distilled water; then they were dried in circulating air heating stove, at 80 ± 1 °C for 24 h. Later, they were split in quarters, and 500 g were crushed in a hammer mill, 1 mm