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- Thinning stands with the thinning intensity of about 20% and 30% had no significant effects on species diversity, biomass of shrub and herb, and physical properties of soil. 各林分的树种组成在12年间基本没有发生变化,即间伐没有显著地改变林分的树种组成,目前的树种组成即落叶松、其他针叶树(云杉、冷杉和红松)和阔叶树组成比约为6:3:1可能是相对稳定的群落。
- The results in this paper fully showed the synergetic effect of humic acid on chemical fertilizer and ameliorable effect on physical properties of soil. 通过一些试验充分验证了腐植酸对化学肥料明显的增效作用,也总结了含腐植酸的有机-无机复混肥对土壤物理性状的改良作用。
- This paper discusses effect of soil physical properties,stress history,structural behaviour,rheological properties of the soil-skeleton and stress-strain path under measurement on the lateral earth pressure at rest. 本文讨论了土的物理属性、应力历史、结构特性、土骨架的流变性质以及测量时采用的应力一应变路径等对静止侧压力的影响。
- measurement of physical properties of soil 土壤物理性质测定
- mechanical and physical properties of soil 土壤机械物理性质
- Results show that chemical and physical properties of soils such as pH, conductibility, cation exchange capacity as well as the nutrition and fertility are improved when mixed with sludge. 研究结果表明,污泥堆肥与滩涂土混配后,土壤声、电导率、阳离子交换量等理化指标得到改善;营养得到补充,肥力提高明显;
- Compare the physical properties of the two substances. 比较一下这两种物质的物理特性。
- There is no influence for the properties of soil by using PASP. 施用肥料增效剂聚天冬氨酸对土壤性质无明显影响。
- Physical Properties of Soil and Water Conservation Function of Some Types of Non- commercial Forest 几种生态公益林土壤物理性质及其水源涵养功能
- Effect of planting raspberries and blackberries on the physical properties of soil 树莓和黑莓对土壤物理性质的影响
- Moisture Content and Physical Properties of Soil under Brushwood of Nitaria tangutorum in the Ulanbuh Desert 乌兰布和沙漠白刺灌丛土壤水分及物理特性的研究
- Experimental study on physical properties of water harvesting surface made of glass fiber reinforced mixture of soil and portland cement 玻璃纤维水泥土集雨面物理性能的试验研究
- Field capacity is a property of a unit volume of soil. 野外容水率是单位土体的一种特性。
- INVESTIGATION ON PHYSICAL PROPERTIES OF SOIL IN RELATION TO THE INDEX OF SOIL RESISTANCE TO EROSION IN THE REGION OF TZIWU-LING, KANSU 子午岭?家砭地区土壤物理性质与土壤抗侵蚀性能指标的初步研究
- physical properties of soil 土壤物理性质
- Influence of Pinus tabulaeformis and Mongolian oak Planting on the Physical Property of Soil 油松蒙古栎种植对土壤物理性质的影响
- These electrical bridges measure the physical properties of insulating materials. 这种电桥可以测量绝缘材料的物理性能。
- Biological communities are initially limited by the existing physical properties of the site on which they occur. 生物群落在其出现的地区最先受到生存环境自然特点的限制。
- The gradation in the physical properties of the alkanes is typical of a homologous series. 烷烃物理性质的逐渐变化是同系列的特点。
- The need to understand the physical properties of nanostructures is ubiquitous in our modern society. 由于电子元件愈做愈小,对其中微小结构的物理性质的了解十分重要。