semiarid

The results show that: the rainwater catching terraces with a ratio of plane cropland area to sloping area 1 ∶ 1 on the hillside fields should be constructed in this hilly semiarid area;

结果表明，该地区坡耕地适宜修建1∶1平坡比的集流梯田工程；

Effect of Atrazine on Chernozem Soil Microbial Activity in Semiarid Region of Northeast China

阿特拉津对我国东北半干旱区黑钙土微生物活性影响研究

Dryland farming is such an agricultural type fed by annual rainfall in arid and semiarid area.

旱地农业是指干旱、半干旱区的雨养农业.

The middle west area of the USA is the semiarid and arid agricultural region in the USA where agricultural and animal husbandry products account for about half of the USA.

美国中西部地区是美国的半干旱和干旱农业区，其农畜产品约占全美一半。

Ningxia belongs to mid-temperate semiarid continental climate with few rains, strong wind and plenty of sands, as well as frequent drought.

宁夏属中温带半干旱大陆性气候，降水少，干旱频繁，风大沙多。

The function test and research of deep planting earth auger in semiarid sand

半干旱沙地深栽造林钻孔机的性能试验与研究

Shortage of water resources restricted agricultural production in arid and semiarid region.

水资源紧缺限制了干旱半干旱地区农业生产.

A Water and Heat Transport Model in Arid and Semiarid Regions

干旱及半干旱区土壤水热传输模式研究

Cold regions cover the areas with the average temperature of the coldest month below 0' C.Arid regions cober arid and semiarid areas.

寒区是指冬季最冷月平均温度为零度以下地区；旱区包括干旱区和半干旱区。

This study deals with precipitation fluctuations in the transitional zone between the arid and semiarid regions of northwest China from the 1950s to the 1990s, discusses spatial variation of 250 mm isohyet during the dry years and wet years;

分析了干旱半干旱区过渡带降水的时空变异性，确定了250mm降水量线在丰枯年份的空间摆动幅度。

On the Technical Method for Conducting Geochemical Survey in Hulun Buir Grassland Semiarid

呼伦贝尔半干旱草原区化探方法技术研究

In this paper arid or damp climatic condition and farmland moisture in the west semiarid area of Jilin province was analysed to exp lore the effect of farmland moisture on the climatic yield potentiality in this region.

本文通过对吉林省西部半干旱区干湿气候和农田水分动态特征分析，研究了农田水分状况对这一地区农田光温生产潜力的限制。

The salinity of lake water is a sensitive monitor of climate in arid and semiarid region.

在干旱半干旱地区,封闭湖泊的湖水盐度对气候变化反应敏感.

To estimate the effects of enhanced ultraviolet radiation-B on upgrowth of spring wheat and design answerer plans, the article studied influence of enhanced ultraviolet radiation-B on plant form of spring wheat in middle-high elevation 、 arid and semiarid regions.

探讨UV-B辐射增强对中高海拔、干旱半干旱地区春小麦植株形态的影响，可为正确评估UV-B增强对春小麦生长发育的影响程度并据此制定合理的应对措施提供科学依据。

The Design and Application of Land Desertification Information System in Arid and Semiarid Areas

干旱半干旱地区土地沙漠化信息系统的设计与应用

North China is situated in arid and semiarid regions.

摘要华北地区位于干旱和半干旱地区.

This paper analyzed the eco-physiological characteristics of spring wheat leaf photosynthesis in the semiarid rain-fed agriculture region of Loess Plateau, and their responses to the environmental factors.

分析了黄土高原半干旱雨养农业区田间春小麦叶片光合生理生态特征及其对环境因子的响应。

Crop Choice and Rotation System for Newly Built Terraced Land in Semiarid Region

半干旱区的新修梯田作物选择与轮作制度

2-dimensional land-air model with vegetation effect and Simulation of climate over semiarid region

考虑植被效应的二维地气模式及其对半干旱区域气候的模拟

Desertification drains an arid or semiarid land of its life-supporting capabilities.

沙漠化使干旱或半干旱地区维持生命的能力逐渐枯竭.

Analysis of soil niche in the landscape of semiarid area-west coast of Daihai on Liang Cheng County

半干旱地区景观的土壤生态位分析&以凉城县岱海西岸地区为例

Active lizard having a network of dusky dark markings; of semiarid areas from Oregon and Idaho to Baja California.

身上有网格状深色斑点的活跃的蜥蜴；产于从俄勒冈和爱达荷到加利福尼亚巴加的半干旱地区。

The semiarid region of western Heilongjiang province is an important grain production base in China. However, in the area, average annual rainfall is few and the shortage of water resources is very serious.

黑龙江西部半干旱区为我国主要的粮食生产基地，该区年均降水量少，水资源紧缺问题十分严重。

Water-Collecting Technology Ang Rural Social Structure Change in Semiarid Areas

集水技术与中国半干旱区农村社会结构变迁&以甘肃中部四个农村社区为例

Arid and extremely arid land are deserts, and semiarid grasslands generally are referred to as steppes.

干旱和极度干旱的土地是沙漠, 半干旱草原和通常被称为草原.

Growing seasons in temperate regions will expand, while droughts are likely to ravage further the semiarid regions of Africa and southern asia.

温带地区的植物生长季节将增长，而在非洲和南亚缺水区域，乾旱将更为严重。

Terpenoids are more prevalent in some arid or semiarid climates.

萜类在某些干旱或半干旱气候条件下较为普遍.

Functions and Benefits of Farm land Shelter-belts in Semiarid Sand Land

半干旱风沙区农田防护林的功能及效益评价

Stipa grandis steppe is a typical type of grassland in arid and semiarid area, which is a major grazing land in Inner Mongolia.

大针茅草原是干旱半干旱地区典型草原的一个代表类型，是内蒙古草原区主要的放牧场之一。

Rainless region and semiarid region account for one third of the earth land surface area. In these areas, lack of water has been a bottleneck that restricts the development of agriculture and forestry, has a strong impact on the living and development of human.

地球上约三分之一土地属于干旱区或半干旱区，在这些地方，缺水已成为制约农林业发展的瓶颈，严重影响人类的生存和发展。