Understanding spatial patterns of soils for sustainable agriculture in northern Ethiopia's tropical mountains. oleh Jan Nyssen, Sander Tielens, Tesfamichael Gebreyohannes, Tigist Araya, Kassa Teka, Johan Van de Wauw, Karen Degeyndt, Katrien Descheemaeker, Kassa Amare, Mitiku Haile, Amanuel Zenebe, Neil Munro, Kristine Walraevens, Kindeya Gebrehiwot, Jean Poesen, Amaury Frankl, Alemtsehay Tsegay, Jozef Deckers