After being adulterated with melamine,nitrogen content and Kjeldahl total nitrogen determination value of mixtures tested could be significantly improved,as the tainted milk scandal had been showed.There were the same problems in fertilizers.In this article,the risk of adulterated fertilizers with melamine was analyzed theoretically,in terms of nitrogen effectiveness of melamine to plant,species of absorption and utilization of plant,poisoning effects to plant,as well as food safety problems caused by its r...