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- Evaporation influenced the soil water distribution mainly in the upper soil layer at the initial stages of irrigation. Less irrigation frequency would lead to greater uneven water distribution. 蒸发和灌水频率对风干土壤中水分分布的影响表现为：1)有、无蒸发条件下土壤水分差异在灌水初期主要体现在上部土层，此时，灌水频率越低，此区水分差异越大；
- Soil N2O discharge flux of mulch was higher than that of no mulch treatment, and with the depth of 5, 10, 20cm the soil N2O discharge flux and the net adding flux increased in the order of depth in the upper soil layers. 3 地膜覆盖使5，10，20cm土层处N_2O的排放通量较未覆膜处理显著增加，且随着土层的加深，排放量依次增大，增加幅度也表现为下层大于上层。
- THE ESTIMATE OF FINE ROOT BIOMASS IN UPPER SOIL LAYER OF LARIX OLGENSIS PLANTATION BY GEOSTATISTICS METHOD 采用地统计学方法对落叶松人工纯林表层细根生物量的估计
- The estimate of root biomass in upper soil layer of Fraxinus mandshurica plantation by geostatistics method 采用地统计学方法对水曲柳人工纯林表层根量的估计
- upper soil layer 土壤表层
- 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 particle size scope is in 0 ~ 50mm that It can test in the soil layer. 可以测试的土体的颗粒粒径范围为0~50mm。
- The concentration of Cr6+ was higher in topsoil and Hg2+ in upper soil, but the distribution of Pb2+ in soil showed no apparent trend. Cr6+在土壤表层分布浓度较高,Hg2+在近地表层浓度较高,而Pb2+在土层上的分布没有明显的规律。
- Soil adhesion may be reduced even if water cannot readily permeate the soil layer. 即使水不易进入污垢内层，也能降低污垢的吸附作用。
- On the nitrate-N accumulated characteristics in deep soil layer of winter wheat field in Taihang Piedmont. 太行山山前平原冬小麦田深层土体硝态氮累积特征研究
- Dissolved organic carbon(DOC) adsorption and its influence factor on the soil of Chinese fir plantation were studied with IM isotherm in laboratory experiments. The quantities of DOC adsorption in the lower soil are greater than that of the upper soil. 用模拟实验的方法借助原始物质吸附等温线对杉林土壤溶解有机碳(DOC)的吸附及其影响因素进行了研究。
- The deposition in an underlying soil layer of colloids, soluble salts, and mineral particles leached out of an overlying soil layer. 淀积作用胶状物，可溶性盐和矿物微粒从上层土壤向下层过滤的沉淀过程
- Species number ranked in the following order: brush and herb layer > tree layer > litter layer > soil layer. 每样地的物种数量都是以灌木草本层最多，依次为乔木层、枯枝落叶层和土壤层。
- The soil layer of Rouli is 700 to 800 meters deep. Experts have verified it is the thickest soil layer on earth. 若笠的黄土层厚达七、八百米，经过专家证实，是整个地球黄土层最厚的地方。
- Remanent magnetism of soil layer is taken as a reference frame for locating hy-drocarbon seepage zone. 本文利用土壤剩余磁性作为确定烃类渗漏带的参考系。
- The soil layer of this village is rich in nutrients, and thus suitable for cultivation. 这个村庄土层里的养分肥沃，适合耕种。
- The depth of casing should ensure it can penetrate dirty soft soil layer; its bottom should be tightly sealed. 护筒的埋设深度，应确保穿透淤泥质软土层，并做好护筒底部密封。
- Since August, 1998, Xinjiang area began the measure of soil layer bore stress.It was successively completed 7 stations. 摘要自1998年8月起，新疆地区开展土层钻孔应力测量，先后建成7个台。
- Tears are secreted by an organ under the upper eyelid. 眼泪由上眼睑下面的器官分泌。
- Though many creatures of the soil layer are a drab grey-brown or pale and colourless, there is no reason why a few can't be bright and garish. 尽管土层中的许多生物要么是单调的灰褐色，要么体色苍白暗淡，但仍有一些色泽艳丽，甚至是色彩夺目。
