The purpose of the study was to determine the effect of different boron application methods on grain yield and some agricultural properties of Sakar red lentil variety (Lens culinaris Medic.). The study was conducted in 2018-2019 and 2019-2020 growing years in the boron lack areas of Sanliurfa in Turkey. Experimental design was randomized complete block design with four replicates. Borax and Sakar lentil variety were used as Boron source and plant material, respectively. The methods of applying boron were control (0 kg B da -1 ), to soil (0.20 kg B da-1 ), to foliar spraying (when plants had 5-6 leaves 0.05 kg da-1B and had pre-flowering period 0.05 kg da[1]1B) and to soil+foliar application (to soil 0.10 kg B da-1 + to foliar when plants had 5-6 leaves 0.05 kg da-1 B and had pre-flowering period 0.05 kg da-1 B). According to average of two years; the highest seed yield was obtained from soil + foliar applications (198.57 kg da-1 ). Also, the highest plant height (42.49 cm), thousand seed weight (41.80 g), biological yield (582.96 g m-2 ) values were seen on soil + foliar applications. Protein content of seed (33.29 %) and the boron content of seed (19.09 mg kg-1 ) values increased with boron applications. The most effective boron application method was determined as soil + foliar boron application but other application methods were more effective than control applications.