A technical scheme of grinding-waving bed to be sifted out is adopted and the fined ore grade can reach 40.41%. The rate of recovery is 70.92% in choosing target.
对于富矿的选别，采用粗磨跳汰—摇床的技术方案，得到的锰精矿品位为40.41%，回收率为70.92%的选别指标。
Through field experiment, field demonstration and chemical analysis, we sifted out the fertilizer No. 4 to be the best compound fertilizer specially used for sunflower.
通过田间试验、田间示范和室内分析，筛选出4号肥为向日葵专用肥的最佳配方。
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