The nutrient contents of tobacco-growing soils and chemical composition contents of tobacco leaves were compared between tobacco-rice multiple cropping in paddy field and tobacco single cropping in dry land. The results showed that the pH level and the contents of organic matter, total N, alkali-hydrolyzable N, rapidly available P, water-soluble CI, exchangeable Ca in tobacco-growing soils of tobacco-rice multiple cropping are significant higher than that of dry land tobacco monoculture, while total K and rapidly available K are significant lower than that of dry land tobacco monoculture; The ...