Two field experiments were conducted at Dakahlia., Egypt  during 209/2020 and 2020/2021 seasons to evaluate the response of sugar beet to boron spraying (Control, 1.0 mg B as Milano [15 %boron]/15 L water,  2.0 mg B as Milano 15 %boron/15 L water, 0.5 g B as borax 11%boron /15 L water, 1.0 g B as borax 11%boron /15 L water, 0.5 g B as boric acid 17%boron/15 L water and 1 g B as boric acid 17%boron /15 L water ) and combinations of compost with mineral nitrogen fertilizer (100%  N mineral nitrogen, 75 mineral N + 25 % compost, 50 mineral N + 50 % compost, 25 mineral N + 75 % compost and100% N as compost.). Split plot design in 3 replications was used where, the N sources were attributed at the main plots while, the sub plots included boron treatments. The results showed that 100% N mineral nitrogen was superior treatment compared with the other N treatments, as well as spraying B at rate of 1.0 g 15 L-1 as boric acid came in the first order compared with the other B treatments. On the other hand, the plants received 75 mineral N + 25 % compost and sprayed by Boron from any source and by any rate recorded the better responses compared with plants received 100% N mineral nitrogen as mineral fertilizer without B application.