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- Study on Salinity Migration in Plough Layer Soil Irrigated by Seawater in Semi-arid Region 半干旱区海水灌溉农田土壤盐分运移规律的研究
- Plough layer Soil 耕层土壤
- The urease activity of lime soil showed a vertical distribution law, and it was obviously decreased from plough layer to plowpan, while it was slowly decreased from plowpan to bottom layer. 石灰土脲酶活性呈垂直分布规律，从耕作层到犁底层下降明显，从犁底层到底土层下降缓慢。
- The effective nutrients of 21 samplings of the plough layer (0-20cm) of 4 kinds of major soils of Henan province, were analyzed. 摘要对河南省主要土壤耕层21个样区的土样有效养分含量进行测定分析，结果表明：河南省主要土壤耕层的有机质含量稍缺；
- Using the EMh at the height of 20 cm and the EMv at the height of 100 cm, the measurement models of salt content are established, which can be used to survey the salt content in the plough layer. 以EM38仪器在距地表20cm时的EMh、距地表100cm以下的EMv,建立对耕层含盐量的测定模型,能较为准确地对耕层含盐量进行测定。
- The modulus of base layer soil is related to upper vibrating compaction when filling the subgrade. 摘要路基填筑时，基底模量的大小对上层振动压实具有较大影响。
- The cultivation layer soil phosphatase activity and N2O emission flux appeared negative relation markedly, with correlation coefficient of 0.4660. 结果表明，耕层土壤磷酸酶活性与土壤N2O排放通量呈显著负相关，相关系数为0.;4660。
- A field representative to the high production -region in Yutian county, Hebei province was selected and a 70 kg top layer soil sample was taken from the field in June, 1991. 在河北省玉田县高产地区选一个有代表性的地块，1991年6月麦收后采集70公斤的耕层土样。
- A field investigation on the tilled layer soil in Nanjing region revealed two distinctive types of soil structures, machinery-till related and biological related structures. 摘要南京地区农地耕作层土壤显示2种土壤结构形态：机械耕作以及生物学特征的土壤结构表现。
- The soil had been turned up by the plough. 那片地是用犁翻的。
- Furthermore,undisturbed samples of each layer soil are taken out,and the maximum dynamic shear modulus is obtained by laboratory cyclic simple shear tests. 此外,取出了场地各层土的原状土样,进行了室内循环单剪试验,获得了各层土的动剪模量,并与剪切波速的计算结果进行了比较分析。
- It is a largest influence on upper layer soil moisture dynamic state during infiltration, 10cm depth moisture changes most violent, it is shortest to reach steady time, and the water content of soil layer changesrelatively gentlely under 50cm. 入渗对上层水分动态影响最大，10cm深度处水分变化最剧烈，达到稳定的时间最短，而50cm以下土层含水量变化相对平缓。
- the whole plough layer basal fertilization technique 一次性全层施肥技术
- The space substructure method is used to analyse the space frame, and the finite layer summation method is used for the layered soil. 在分析中，上部结构用空间子结构法分析，而分层土用分层总和法求其刚度。
- The farmer was yoking his oxen to a plough. 农夫正在用轭把牛套到犁上。
- This paper presents a matrix approach for calculating the pile settlement and shaft-load in layered soil. 提出了一种通过简单的矩阵运算求算分层土单桩的沉降和轴力的计算方法。
- This is a soil reluctant to the plough. 这土地很难耕作。
- The plough sliced through the earth. 犁破土向前。
- The influence of sedimentation on overburden pressure and settlement of layered soil is studied and the relevant formulas are developed. 研究了沉积作用对成层地基自重应力与沉降的影响,给出了相应的计算公式,并对几种情况下的计算结果进行了分析比较。
- A random wave-theory analysis method is developed for the random seismic response analysis of layered soil sites under the P-and SV-wave excitations. 提出了P、SV波作用下层状土层地震反应分析的随机波动分析方法。
