我国是一个人多地少的农业大国,粮食问题是全社会极为关注的问题。根据我国社会经济发展的需要国家提出到2000年全国要新增粮食500亿公斤、棉花1000万担的宏伟目标。为了达到国家这一科技指标,良种和科学技术是非常关键的,其中化肥的有效施用和保存也是至关重要的。有的农民手中有了化肥不注 Our country is a large agricultural country with a small population. The issue of food is a matter of great concern to the entire society. According to the needs of China’s social and economic development, the country has proposed that by the year 2000 the grand goal of adding 50 billion kilograms of grain and 10 million tons of cotton to the entire country will be raised. In order to reach the country’s scientific and technological index, seed and science and technology are very crucial, of which the effective application and preservation of fertilizers are also crucial. Some farmers do not have fertilizers in their hands