Stresses and compaction caused by a light and a conventional tractor in two tillage systems - Pöyhönen, Ari; Alakukku, Laura; Ahokas, Jukka; Sampo, Mikko (pl, 1997)
Keywords: Ka; traktorit; maan rakenne; maaperä; tiivistyminen; vertical stress; soil structure; conservation tillage; unmanned tractor