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We are proud that China is one of the biggest countries in the world with 9,600,000 km2 land areas. But the per capita farmland area of China is only about 0. 10 ha2, 0.22 ha2 less than the world per capita farmland area 0.32 ha2. With the sharp increasing of the population and rapid development of real estate, the shortage of grain supply is getting more serious. So, in 21th century, it is very important and urgent to protect limited and un-renewable farmiands for the sustainable use of farmland resources, the safety of food, the development of national economy and the stability of the society.
We are proud that China is one of the biggest countries in the world with 9,600,000 km2 land areas. But the per capita farmland area of China is only about 0 10 ha2, 0.22 ha2 less than the world per capita farmland area 0.32 ha2. With the sharp increasing of the population and rapid development of real estate, the shortage of grain supply is getting more serious. So, in 21th century, it is very important and urgent to protect limited and un-renewable farmiands for the sustainable use of farmland resources , the safety of food, the development of national economy and the stability of the society.