Serekpaev, N.; Seifullin, S.; Nogayev, A.; Bekbulatov, S.; Dorj, B.; Batmunkh, L.; Batdelger, B. Influence of Sowing Time Productivity of Green Mass of Sudan Grass Dry Steppe Zone in Northern Kazakhstan. Mong. J. Agric. Sci. 2014, 11, 63-67.