Among them the paddy soil developed from the weathering product of limestone has much higher nutrient contents than the paddy soils developed from river alluvium and Quaternary Red Clay does.

不同母质发育的土壤相比，以石灰岩风化物发育的水稻土肥力水平较河流沉积物和第四纪红色粘土发育的水稻土高。

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Since complicated alluvium issue need to be solved, clarification basin is costly and construction work is severe disturbed, water power station hardly is built on the river in other country.

由于要解决的泥沙问题复杂，沉沙池造价昂贵，施工干挠大，国外较少在这种河流上建水电站。

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