EN
A field experiment was carried out in 2007–2009 on rendzina soil. The aim of the study was to estimate the influence of different levels of agrotechnic (a – control object; b – twice harrowing; c – Mustang 306 SE; d – herbicide and foliar fertilizer Insol 3; e – herbicide and two fertilizers: Insol 3 and FoliCare 18 : 18 : 18) on yielding of naked (Cacko) and husked (Krezus) varieties of oats. Krezus variety was characterized by a significantly higher number of panicles per 1 m2 rather than naked variety Cacko as well as higher weight of grain per panicle and weight of 1 000 grains. As a result, the obtained grain yield was twice higher in relation to the naked oat. More successful method of plant protection was chemical treatment with herbicide, compared with twice harrowing. The use of foliar fertilizers significantly increased the number of panicles per 1 m2 in comparison to control object but had no significant influence on the grain yield.