This method was created by the researchers of Iwate University,Japan,in the paddy field reclamation(PFR) on the volcanic ash soil in early 1960s.
介绍日本早在６０年代初期火山灰土壤水田开发实践中由岩手大学的研究者们创造和发展的“破碎碾压工法”的基本原理及其应用，并对最近中国砂质土壤渗透抑制的室内外研究结果进行了简单介绍，目的是为漏水性土壤地区水田开发以及土壤防渗工程措施提供借鉴。
It is favorable to research on pedogenesis and development of mountain soils in tropocal region.
对地处热带的海南岛尖峰岭地区的山地土壤的发生和发育特性进行了研究。
This research was about the law of slope-directive variation of mountain soils in the northern Henduanshan Mountains and the eastern of Jinsha River.
本文研究了横断山区北段金沙江以东山地土壤的坡向性分异规律。
Studies on the fertility of mountain soil in the west of Sichuanbasin,Sichuan province;
四川盆地西缘山地土壤肥力评价
A study was carried out to know the vertical change of the properties of mountain soils in Mid subtropical zone in China with altitude.
5 ,而山地土壤 <0 。
Utilizing the method of X-ray diffraction analysis,in detail,dealed with the composition of soil clay minerals of the mountain soil vertical zonality in.
以X射线衍射分析,研究了长江上游山地土壤的粘土矿物组成。
Research results show that main diagnostic horizons and diagnostic characteristics of mountainous soils in Fujian province are as the followings: Histic,.
福建山地土壤在我国亚热带山地土壤中具有一定代表性。
Characteristics or zero point of charge of volcanic ash soils in Changbaishan and Wudalianchi.
长白山和五大连池火山灰土壤电荷零点特性
A volcano belches smoke and ashes.
火山喷出黑烟和灰土。
The main soil types are mountain yellow-brown earth and limestone soil, and mountain marshy soils in localized areas.
其主要土壤类型为山地黄棕壤和石灰土及局部的山地沼泽土。
identification of podzols and podzolised soils
鉴定灰壤土和灰化土
portland pozzolan concrete
火山灰硅酸盐水泥混凝土
Mounds of pumice and volcanic ash mark its center, where the volcano remains.
浮石和火山灰的土墩标志着它的中心，是火山的遗迹。
In terms of industrial type,burnt stone is a burnt clay mixed material of artificial volcanic ash.
工业类型为人工火山灰质烧粘土混合材。
Study on the Design and Construction Technology of Volcanic Ash Cement Concrete Pavement
火山灰水泥混凝土路面设计及施工技术研究
THE STUDY ON POTASSIUM EQUILIBRIA IN LIMING SOIL IN DU SHAN COUNTY OF GUIZHOU
贵州独山地区山地土壤施用石灰对钾素平衡规律的研究
Analysis and Research on the Physical and Chemical Properties of Limestone Mountain Region Soil and the Vegetation State of Yunlong Mountain in Xuzhou;
徐州云龙山石灰岩山地土壤理化性质与植被状况分析研究
portland-pozzolana cement
火山灰质硅酸盐水泥
ash that was thrown By an erupting volcano.
火山爆发喷到空中的灰
The volcano ejected lava and ashes .
火山喷出熔岩和灰。
The village was overwhelmed by ash from the volcano.
村子被火山灰覆盖。
A volcano emits smoke and ashes.
火山散发着烟和灰。
volcanic ash and lava build the mountains that we call volcanoes.
火山灰和火山岩在喷射口堆积构成了火山。
Dense clouds of ash were generated during the volcanic eruption.
火山爆发时, 产生了浓密的火山灰云。
A volcano that vomited lava and ash.
喷出岩浆和火山灰的火山
