Chinese grain production and fertilizer use were temporally and spatially analyzed in terms of the experimental data and the results of investigation. It has been realized that the fertilizer use is one of the great achievements in grain production in China in the 20th century. The average rate of contribution of fertilizer use to grain production is 46.43 per cent. Using one ton of fertilizer can increase 8.84 tons of grain. The output of grain and the amount of fertilizer use will continuously rise in Chi...
修改评论