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磷肥巴农作物下可缺少的化学肥料之一,而目前施用量大的是过磷酸钙,农民叫“普钙”现介绍简易识别其真假优劣的方法
One of the chemical fertilizers that can be absent under the phosphorus and barley crops, and the current large amount of application of superphosphate, peasants called “general calcium” is now introduced a simple way to identify the true and false advantages and disadvantages