蝗卵土层分布
Locust egg soil distribution
三维群桩-分层土-上部结构相互作用
3D Pile-Group-Soil-Structure(PGSS) interaction
分层粘性填土
nonlinear
layered cohesive backfill
粉性土、砂土薄层的划分
division of silty and sandy soil
耕层土壤养分调查
investigation of topsoil nutrients
基层土壤分类
chinese soil taxonomic classification
两层土壤分解法
analytic method of two soil stratumta