土法鉴别磷肥质量一看形状。一般含有效磷１４％～２０％的过磷酸钙呈粉末状，无结块，如果结块多，则说明肥效已降低，质量较差。二摸湿度。优质过磷酸钙的含水量不超过１４％，握在手里有凉爽感，而且不会在手上留下水迹。如果过磷酸钙过湿，手摸时就会粘在手上；过于则... Indigenous identification Phosphate quality look at the shape. Generally containing 14% ~ 20% of available superphosphate calcium powder was powder, no caking, if more caking, then fertilizer efficiency has been reduced, the quality is poor. Two touch humidity. High-quality superphosphate water does not exceed 14%, holding a cool hand in the hand, and will not leave traces of water in your hand. If the superphosphate is too wet, it will stick to the hand when it touches; too ...