The experiment was conducted in 2002-2004 in organic farm located near the Landscape Park "Dolina Bystrzycy" near Wrocław. The objective of the experiment was to determine the effect of row direction and seeding density on grain, straw and biomass yield and on yield components of naked oat. Soil for the experiment was alluvial type. It belonged to IIIa quality class of very good rye suitability complex. The amount of basic nutrients in soil was low and the soil pH was very low. Winter rye was the preceding crop for Akt cultivar of naked oat. Soil and adverse weather conditions negatively affected plants growth and development, yielding and components of yield. The micro-plot experiment was established according to plit-plot design with four replicates. The main treatment was seeding density: 400, 500 and 600 viable grains/m2. The second treatment was row direction of oat at seeding: north-south, east-west and in circles. The treatments did not affect significantly grain, straw and biomass yield of naked oat. The treatments affected significantly weight and number of grains in panicle of naked oat. At seeding density of 400 grains/m2 and sowing in circles oat had the highest thousand grain weight and grain number and weight per panicle.