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近年以来,由于绿肥面积的扩大,化学氮肥用量的增加,高产作物品种的推广以及低产田的改良等,对磷肥的需要也随之大为增加,磷肥的供应问题便显得十分突出。解放以来,地质工作者发现了大量的磷矿,其中一部分已经做了详细的勘察,化学工业部门也根据我国具体条件,生产了适
In recent years, due to the expansion of green manure area, the increase of chemical nitrogen fertilizer use, the promotion of high yield crop varieties and the improvement of low yield fields, the demand for phosphate fertilizer also increases greatly. The supply of phosphate fertilizer becomes very prominent. Since liberation, the geological workers found a large number of phosphate rock, some of which have done a detailed survey, the chemical industry department also based on China’s specific conditions, the production of appropriate