The Diversity of Soil on Uphill and Downhill of Woodland and its Influence on Growth of Trees;
林地上下坡土壤的異質性及其對樹木生長的影響
In order to study the effect of gradient and length of long and steep downgrade on the traffic accidents,the data of 1276 traffic accidents which occurred in 5 different typical downgrades(76.
為了研究連續下坡道路的坡度、坡長與事故的關系,采集了5條典型連續下坡路段(總長度為76。
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