土层

Weathered rock is the predecessor of saprolite and is mainly made of corestones surrounded by saprolite crust.

土层可贮存上层滞水，风化岩带则可赋存潜水或承压水。

Effect of nutrient management on selected topsoil characteristics of a basalt derived Ferralsol in Dak lak ,Vietnam.

表5 养分管理对达拉克(Daklak)一种玄武岩发育的铁铝土本些表土层性质的影响 Table 5.

At harvest,root length density and treflan concentration at different soil layer were evaluated using soil auger method.

冬小麦收获后,采用土钻法在滴头附近沿垂直方向分层取,各土层的根长密度和氟乐灵含量,并统计各小区的产量。

However, as the soil conditions mentioned above are changed into the claypan, error of 20% was estimated by numerical results.

但将层状黏土简化成单一黏土层分析所得之桩极限荷重，其误差可达20%。

A residential buildings with 18 story built on the ground consisting of soft marine clay and the subgrade was treated with vibroflotation.

摘要18层住宅楼建在天然地中的含淤泥土层上，地采用振冲法处理。

It is concluded that the average degree of radial consolidation for a given soil layer increases with its buried depth since the geostatic pressure increases with the lattar.

结果表，重应力随深度增加，土层径向排水平均固结度随其埋深而增大。

The nutrient of C, N, P, K in rice straw buried by rotocultivator in deep soil layer released at a high rate and less remain than on surface soil.

运用机械将稻秸秆深施于水田土层内，秸秆中的碳、氮、磷、钾养分释放比秸秆面施速率高，残留量少。

Site soils in southern area of Jiangsu province belong to washland sediment or limnetic facies sediment.The components of sediment are very complex and process of sedimentation is in disorder.

苏南地区场地土主要为漫滩相、湖沼相或冲湖相新近沉积软弱土,结构松散,沉积零乱,成分复杂,饱水可液化粉细砂层及粉土层较为发育,在地震或动力荷载的作用下有可能发生软土震陷或砂土液化。

Or through high ridge in a field, covering terra, increasing the temperature of earth, increasing the thickness of dust and frowst in the day time can all be the methods of toting temperature.

起高垄、覆地膜，提高土温，增加热土层厚度，白天不通气或尽量少通气方法加温。

The central concept of Inceptisols is that of soils of soills of humid and subhumid regions that have altered horizons that have lost bases or iron and aluminum but retain some weatherable minerals.

始成土的主要特性在于它分布在湿润半湿润地区，发育有丧失盐或铁铝但保留可风化矿物的土层。