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l introductionYucheng area is located in the downstream alluvial plain of the Yellow hiver in Shandong provillce,Nortll China. bouenced by the conhnenlal monsoon clllnate in wann tCmperate zone, fainfall isdistributed very unevenly in bine. AVerage annual precipitation amounts to 600 ~ with 70%concentrahng from June to September The mother material of soil is conStituted by river alluvium andmainly consistS of mealy sand and light loam. Vadose zone consistS of mealy san4 its dry bulk densi… 相似文献
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