查询词典 fertile farmland

This paper, based on the land utilization change data during 1997 to 2005, applies the information entropy and equilibrium theory to study the temporal-spatial changes in land utilization structure in Lingshui county, with results indicating: a first slow and then a fast rise in information entropy of land utilization structure in Lingshui county and a general trend of rising homogeneity in land utilization structure; the information entropy of land utilization structure ascends from NW to SE, where can be divided into five regions, ecological protected area, resort area, farmland protected area, ecological agricultural construction area and comprehensive industrial developing area; the economic factors and populational structure play a key part in land utilization structure changes via principle componential analysis.

基于陵水县1997-2005年土地利用变更数据，利用信息熵和均衡度的基本原理，对陵水县土地利用结构的时空变化进行实证分析。结果表明：1陵水县1997-2005年土地利用结构信息熵和均衡度呈现先缓慢增长、再加速增长的变化过程，总趋势是土地利用结构的均质性逐渐增强；2）陵水县土地利用结构信息熵从西北向东南逐渐递增，依次可分为生态保育区、风景旅游区，基本农田保护区、生态农业建设区和综合产业发展区5个区域；3）利用主成分分析，经济因素和人口结构对陵水县土地利用结构变化影响重大。

Based on the assessment of urban forest, shelter forest of farmland, Masson pine forest, Bamboo forest of Phyllostachys praecox f.

对于恢复过程中的森林，研究认为其健康评价更适合采取健康趋势的概念。

Heat and drought are threatening some of the America's most producted productive farmland.

高温与干旱正威胁着美国最丰产的一些农场。

By analyzing soil quality of 4 kinds of land use types in Kalamay agriculture development area according to principal component analysis, we draw the conclusions: nature shrub tree land is affected little by mankind, a great deal of organic matter return to soil every year, and root system can improve soil physical quality, can absorb salt from soil, so the soil quality of nature shrub tree land is the best; the soil quality of farmland is better than the soil quality of manpower Tamarix Bulrush land, which may be reasoned that man make for soil quality by irrigation to exclude salt and fertilizing organic muck in the earlier oasis digging up period. Soil physical qualities of tree land get harden and worsen for flooding irrigation, furthermore climate in Kalamay is dry and rainless , the other irrigation is very long time after the former one, so soil get harden severity and result soil physical quality get worse and worse.

利用主成分分析法分析新疆克拉玛依农业开发区四种土地利用方式下的土壤质量，得出：天然灌木林地，受人为影响较小，每年有大量有机物质返还土壤，且天然灌木的根系可以很好的改良土壤的物理性质，同时所选天然灌木林灌木多是耐盐碱并且本身又具有吸收积累来自土壤的盐分，土壤质量最好；农田受到的人为影响最大，但农田综合得分却好于人工柽柳芦苇地综合得分，这可能是由于在开垦初期的绿洲农田，受到了人们灌水压盐及增施各种有机无机肥料等有利于土壤质量提高的措施所致；乔木林地，由于人们用大水漫灌的方式灌溉，致使林地土壤变得板结，土壤物理性质下降，加上克拉玛依地区气候干燥少雨，一次灌溉后较长时间后才有下一次灌溉，致使土壤理化性质恶化，土壤质量不高。

As E10 for example, it needs 152, 796 ha sugarcane farmland to recultivate. On the other side, according to the result of life cycle assessment and comparative analysis, the energy output is positive with developing fuel ethanol such as a type of bioenergy. It also can improve air quality and slow down CO2 emission effectively as well.

经由本研究生命周期评估与比较分析之结果，了解发展燃料酒精之生质能使用型式之能源净产出为正值，且可以有效提升空气品质以及减缓CO2排放之效益。

Farmland green treefrog belonging to the family Rhacophoridae is endemic to Taiwan. The mating system of Rhacophorus arvalis is lek. From April 2003 to June 2004 at Yunling in central Taiwan, I investigated the lekking behavior and daily activity pattern, and analyzed the ecological factors on habitat to understand the lek preference in male frogs.

诸罗树蛙属於树蛙科为台湾特有种两栖类，其配对系统属於典型的群集展示系统。2003年4月至2004年6月间，研究者在云林县斗南镇观察记录本种树蛙的群集展示行为及日活动模式，并分析栖地的生态因子，以了解雄蛙对於展示场地选择之偏好。

It includes ditching and ridging machine, ditching and pipelaying machine, shovelling and slinging machine, groundlevelling machine, and other machinery for farmland capital construction.

包括开沟筑埂机、开沟铺管机、铲抛机、平地机、其他农田基本建设机械。4。种植机械。

Cultivation soil preparation total principle is break up in order to plough (tractor-ploughing) or avoid less agrarian for the foundation, rake, Mo , pressure, ridging ridging plough, ditch, make the work look tie such as farmland, master appropriate correctly opportunity of exercise of agrarian, appropriate make smooth with a raking, reduce cultivation charge and the sources of energy to use up accomplish reasonable cultivation, assure exercise quality.

耕作整地总的原则是以耕翻或少免耕为基础，耙、耱、压、起垄、开沟、做畦等作业相结合，正确把握宜耕、宜耙作业时机，减少耕作费用和能源消耗做到合理耕作，保证作业质量。

A cooperative study project of low pressure pipe lines water transfer irrigation technology was funded by the Water Conservancy Bureau of Ji-ning City, the Farmland Ir- rigation Institute of Water Resource Min...

至1991年底，全市共完成地埋低压石屑混凝土管道输水灌溉面积74kha，占全市井灌面积的1/3，取得年节水量277百万m~3；年节电28.86百万kW·h；年增产粮食100百万kg；年总效益50780千元的经济效益。

It was the highest point in the area and provided excellent observation of the Roer River less than a kilometer to the east, and of the mixed farmland and forest around it.

它是本地区最高点，可以对鲁尔河东大约一公里范围内提供很好观察，高地周围混杂着农家院子和森林。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。