The Impact Of Grain's Land-scaled Management On Land Productivity

In the process of China's rapid industrialization and urbanization,a large number of rural labors went into the industrial sector,resulting in a general rise in the real wage rate of China's labor force,especially rural labors.The rise of labor prices also led to the replacement of production elements in the agricultural sector.More and more farmers began to use agricultural machinery to replace manpower.However,agricultural machinery is inseparable,which puts forward higher requirements for the land scale of farmers.This is a great shock for the household contract responsibility system in China.Combined with China's relaxation of the land transfer market,the land scale of China's farmers continues to expand in recent years.As everyone knows,the small decentralized management mode in China lasted for thousands of years,and the high land productivity which leads the world is the key to feeding China's huge population.According to estimates,China has 7%of the world's arable land to feed the world's population of nearly 22%.However,with the expansion of farm scales,can the high land productivity in China maintain?What changes will happen?Are there any differences between different crops?What are the factors that contribute to this change?The answers to these questions will not only provide a solid theoretical basis for judging the direction of agricultural development in China,but also provide a reliable basis for the formulation of relevant agricultural policies.This paper explains the impact of farm scale on land productivity from the perspective of mechanization and quality of hire labors.Firstly,the literature review of relevant domestic and international researches and a summary of research results are put forward;secondly,based on the theory of scale economy,this paper build a theoretical model;third,this paper conduct an empirical test based on the data from four provinces(Heilongjiang,Henan,Zhejiang and Sichuan);finally this paper draws conclusions:(1)In rice production,farmer scales and land productivity shows relationship with "inverted U" shape;(2)In maize production,farmer scales and land productivity shows relationship with "(?)" shape;(3)Mechanization and quality of hire labors are important factors which influent the scale-yield relationship.However,because of the differences between different crops,the influence level of these two factors will also differ in different crops.According to the conclusions above,this paper has the following implications:(1)For rice,from the point of view to improve the overall land productivity in China,our government should not encourage rice growers to continue expanding their farm size under current level of technology.(2)For corn,from the point of view to improve the overall land productivity in China,our government should encourage corn growers either to maintain the current small scale,or to hold large-scale farms of 500 mu-8000 mu,using large machinery to produce corn.