1, the southern latitude is low, and the solar illumination conditions are good;
2. There are many low mountains and hills in the south, and the terrain fluctuates slightly;
3. There is abundant precipitation, dense river network and sufficient irrigation water in the south.
On the other hand, rice needs good light conditions and sufficient water resources to meet its growing period.
The reason why wheat is suitable for planting in northern China;
1, vernalization Wheat must undergo low temperature conditions to promote flower bud formation and flower organ development. The temperature in the north is low, and wheat is easy to pass the vernalization stage.
2. Low temperature, long illumination time and large temperature difference between day and night are beneficial to the formation of wheat protein. So the north is suitable for growing wheat.
Rice is suitable for growing in the south and wheat is suitable for growing in the north. It is also because rice needs high temperature, and wheat must grow through low temperature. Low temperature in the north is not suitable for rice growth, and high temperature in the south is not suitable for wheat growth.