1, China's main rice production area in which 2, the main production area of cotton in which 3, the main production area of barley in which 4, the main production area of wheat in which

Rice: rice like temperature, like moisture. By heat conditions can be divided into: single-season rice, double-season rice, triple-season rice. China's Qinling Mountains to the north of the region to the single-season rice, south of the double-season rice. The middle and lower reaches of the Yangtze River plains, the Sichuan basin and other places is China's main rice producing areas.

Cotton: Cotton prefers moisture, light, long growing period. The growing period of cotton is generally 150 - 200 days. China's cotton is mostly distributed in the warm temperate zone of the Huanghuaihai Plain and the South Xinjiang Basin. At present, China's cotton dominant regional focus: the Yellow River Basin cotton area, the Yangtze River Basin cotton area, the northwest inland cotton area.

Wheat: wheat cold, drought, adaptable, according to the sowing season is divided into spring wheat and winter wheat. Spring wheat sown in the spring, summer and fall harvest, the growing period of 80 days - 120 days. Spring wheat is mostly distributed in higher latitude or higher altitude, poorer heat areas. It is mainly distributed in the middle temperate zone of the Northeast Plain, Hetao Plain, Ningxia Plain, Xinjiang and the Tibetan Plateau. Winter wheat is sown in the fall and harvested in the following summer, with a long growing period of about 120 days in the south, 270 days in the north, and generally more than 330 days in the higher areas of the southwest. China's winter wheat is the most widely distributed, mainly in the Huanghuaihai Plain, south of the Yangtze River is also distributed.

Currently, China's specialty wheat advantageous regional focus: Huanghuaihai high-quality wheat belt, the lower reaches of the Yangtze River high-quality wheat belt, high-quality wheat belt along the foothills of the Daxinganling.