Statement 1 is correct. Rice is the principal Kharif crop in India and is grown in the largest area among all crops during the Kharif season. Statement 2 is incorrect. The area under the cultivation of oilseeds (such as soybean, groundnut, etc., which are significant Kharif crops) in India is substantially larger than the area under Jowar cultivation, especially considering only the Kharif season for Jowar. Statement 3 is correct. The area under cotton cultivation in India is significantly more than the area under sugarcane cultivation. While sugarcane is also grown, its total area is less than that of cotton. Statement 4 is incorrect. The area under sugarcane cultivation in India has not steadily decreased over the last five years; it has generally remained stable or shown some increase.