The Obstacles in the Current Agricultural Development

Several obstacles confronted in the current agricultural development are described:1)It has become more difficult than ever before to increase the per capita possession of grain yield because of the reduction in the growth-rate of grain in the world and accelerating expansion of population;2)As agricultural yields no matter in terms of economics or biology are approaching their maximum limit the current agricultural couldn't bear the anticipant load appearing in the future;3)The world grain area per capita has been reducing ceaselessly.The benefit index of agricultural input is decreasing year by year.Using chemical fertilizer and pesticide are always followed by their pollution to the environment.It is pointed out in this paper that the transforming the current agriculture is ugently necessary.