发育良好，土表下有一层粘土淀积土层。
These soils are well developed and contain a subsurface horizon in which clays have accumulated.
本文的研究揭示了地膜覆盖节水特征和抑制土表积盐机制。
The researches in this paper showed the characteristics and mechanics of plastic mulch which preventing soil salt from moving to soil surface.
土表的铵态氮也呈波动变化，随着烤田时间的增加铵态氮含量降低。
The concentrate of ammonium-N fluctuated in soil surfaceand decrease as the delay of soil drying.
土表的硝态氮浓度不断增加，烤田增大了复水后硝态氮向地下水淋溶的趋势。
The concentration of nitrate-N increased continuously in soil surface, which resulted in nitrate leaching to groundwater after rewetting.
实验表明：净风对土表的风蚀作用微弱，即使在遭到大风吹刮时，土表的结壳仍不易受到破坏。
The experiment indicates that wind itself is of weak effect on ground surface erosion, so that the soil crust may not be destroyed even under great wind velocity.
虽然在少耕制下，土壤钾有明显的分层分布但在土表附近，作物根系发达保证作物对钾有足够的吸收。
Even though potassium is stratified under reduced tillage, it is apparent that roots proliferate sufficiently near the soil surface to assume adequate potassium uptake by crops.
若能把铁线莲种植得足够深，深到能使两组叶子(或叶节点)在土表以下，你就等于给加了它一份保险。
When you plant clematis deep enough to put two sets of leaves (or leaf nodes) under the surface of the soil, you give the plant an insurance policy.
利用我市秋季的资源优势，在早、中稻收获后的茬口田，采用免耕土表播种、施肥后再覆盖稻草栽培秋马铃薯。
By using advantageous natural resource in autumn, potatoes are planted in paddy soils and covered by rice haulms without plowing up the soil after the harvest of rice.
其垂直分布幼虫主要集中在离土表6厘米内，土茧95 %以上分布在离土表3厘米内，幼虫结茧有向上爬习性。
The vertical distribution shows larvae are mainly distributed within 6 cm below the soil surface, and 95 percent of the cocoons crowd within 3 cm below the surface.
采用土培试验研究了嘉花1号这种基因型水稻根系通气组织对其根表铁膜形成的影响。
Soil culture experiment was conducted to study the effect of rice root aerenchyma on root iron plaque by Jiahua 1 this kind of genotype rice.
并对试验结果进行了数值拟和，由此获得了宁明膨胀土非饱和抗剪强度表[表达]式。
A shear strength formula of Ningming unsaturated expansive soil is put forward as result of regressing the testing result.
因此，在铁路桥涵设计规范中，原有的地基承载力表已不能使用，需对新标准中各种细粒土的承载力重新进行研究。
Therefore, the used bearing capacity tables in the criterion of railway bridges and culverts foundation designing are out of date.
用透明胶法对蕨麻试管苗与土培苗叶表特征进行了观察比较。
The leaf epidermis structure of test-tube seedling and field seedling were observed with transparent rubberized fabric sticking method.
分别采制上述不同土壤类型或林型下的土壤表层和表下层的原状土祥，制取土壤薄片，进行土壤微形态学比较研究。
Undisturbed soils samples obtained from surface and subsurface soil layers under different forests were used to make thin sections and study micro-morphological characteristics.
提出了已知天然含水量确定淤泥类土天然孔隙比及天然重度的经验关系表。
An experience relation that known natural water content defined a natural void ratio and a natural weight-specific density in the sludge...
提出了已知天然含水量确定淤泥类土天然孔隙比及天然重度的经验关系表。
An experience relation that known natural water content defined a natural void ratio and a natural weight-specific density in the sludge types...
提出了已知天然含水量确定淤泥类土天然孔隙比及天然重度的经验关系表。
An experience relation that known natural water content defined a natural void ratio and a natural weight-specific density in the sludge types...
应用推荐