1.政策性积压。由于生态需要而政策上限制出售的,如农药有机氯、有机汞禁止在农田上使用。 2.改革动向看不清。由于农村产业结构调整要种大麦,而使刚从凤阳调入的5万公斤紫云英种子积压;以往小化肥厂生产碳铵很多,而过磷酸钙较缺,农民常用两肥相拌。但随着城市改革,碳铵很少生产,而生产站调来的过磷酸钙也就因无碳铵可拌而滞销. 3.凭经验进货。如1984年本地锈病大流 1. Policy backlog. Due to ecological needs and policy restrictions on the sale, such as pesticides, organic chlorine, organic mercury ban on farmland use. 2. Reform can not see clearly. As a result of the adjustment of rural industrial structure to barley, and just transferred from Fengyang 50000 kilograms of Astragalus seed backlog; in the past a small fertilizer production of ammonium bicarbonate, and the lack of superphosphate, farmers often use two fat mixed. However, with the urban reform, ammonium bicarbonate is rarely produced, and the production site transferred to the superphosphate because of ammonium bicarbonate can be mixed and slow-moving. Such as 1984 local rust flow