| Based on researching the application of fertilizer in xi'an from 1995 to 2002, this article find nitrogenous fertilizer is used too much and potassium fertilizer is unenough. It's the factor which causes the agricultural non-point source pollution in xi'an. And this article puts forward the reasonable method to control the agricultural non-point source pollution with reducing fertilizer's pollution, saving water for (irrigation,) and developing agricultural buffer zone. |