The result of the field experiment on applying potash fertilizer and covering grass has showed that potash fertilizer and covering grass can help to enlarge the outcome of the crops；In addition, it can also protect Edible abelmoschus from disease. Totally, by applying potash fertilizer and covering grass, the production reaches dramatically by as high as 36.4%, meanwhile, the rate of getting sick decrease by 17.4% to 18%; the relative effect of protecting weeds gets to 89.7%.