Effect of irrigation and nitrogen on growth, yield and quality of flue-cured tobacco cultivars under different soil textures / A. K. Shafique Ahmed Khan [PhD Thesis] Khan, A. K. Shafique Ahmed Tobacco 633.71 KHE Thesis(Ph.D.)--Department of Soil Science, University of Dhaka, 1980. Bibliography : p. 317-341 Dhaka : University of Dhaka, 1980. 1980. 1980 Text xviii, 359p. : eng