Developments and Efficiency Considerations in Phosphate Rock Mining

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  Natural resources represent global assets containing extraordinary economic value indispensable for societal and technological development.Early examples like stone,bronze and iron ages show the dependency of technological and societal advancements based on natural resources.
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Phosphorus is one of the essential elements for plant growth.Long-term overgrazing usually causes soil P deficiency in grassland.Stipa grandis and Leymus chinensis are dominate species of typical step