With the combination of GIS technology and remotely sensed data,cultivated land changing trend in regional scale can be easily traced and inventoried in time.
结果表明,在过去50多年里,三江平原耕地面积发生了显著变化。
In Beijing, the cultivated land area has decreased from 456,040 ha in 1981 to 287,633 ha in 2001.
80年代年以来 ,北京市土地利用结构发生了巨大的变化 ,突出表现在耕地面积大量减少。
It reveals that the difference of the two kinds of farmland area estimates was mainly caused by the difference in the caliber of their measurement units and the difference in the coverage of the data applied in both kinds of estimation.
深入分析耕地面积详查数据与统计数据的来源和计量单位口径以及数据覆盖范围,建立了详查口径耕地面积与统计口径耕地面积的关系方程。
The results showed that: the cultivated land area,the total output and the quantity per capita of grain had been increasing,the pressure index of cultivated land had trended to decrease obviously between 1981 and 2006;but in the comin.
研究结果显示:1978-2006年,内蒙古耕地面积、粮食产量和人均占有量都有所增加,耕地压力指数呈现明显降低的趋势;但未来近十年内,耕地压力指数会增大,到2017年,耕地压力指数将达到1,之后耕地压力指数进一步增大,遭遇耕地危机,严重影响粮食生产的发展。
The conclusions are as follows:① The pressure index in cultivated land in Shaanxi province is gradually increased,cultivated land pressure is mounting,because the cultivated land is greatly reduced and the population increases gradually;② The cultivated land area ch.
结果表明:虽然粮食单产和复种指数不断提高,但是由于耕地面积大量持续减少、人口的不断增多,1978~2005年陕西省耕地压力指数较高,耕地压力较大,并且呈上升趋势;2005年区间耕地压力差异不显著,但区间1996~2005年耕地压力变化差异明显,陕北高原区>秦巴山区>关中平原区。
The surveys and prediction of cultivated land area provide an effective way for cultivated land protection.
耕地保护事关一个地区粮食战略安全问题,而耕地面积的测算与预测为耕地保护提供了决策支撑。
A nonlinear model about grain total output and cultivated area is set up.
通过建立粮食产量与耕地面积间的非线性动力学模式,分析粮食产量与耕地面积之间的关系。
By analysis of the land used for urban construction for eight years and the decreasing cultivated land for ten years,employing mathematics model to infer cultivated area in 2010,it is concluded that the increasing of urbanization will definitely result in the enormous extention of construction land.
通过对衡水市近8年来城镇建设用地、近10年耕地减少的情况进行分析,并利用数学模型对2010年的耕地面积情况进行推测,得出了“城镇建设的加快必然引起建设用地大幅增加”的结论,并进而提出了解决这一矛盾的3种途径:即保护存量,走规范发展之路;盘活存量,走内部挖潜之路;提高存量使用标准,走高效发展之路。
Cultivated area increase by 51.
近十年内蒙古东北部额尔古纳市、科右前旗、东乌珠穆沁旗等２４ 个旗市耕地面积增加了５１。
Among all of the grain crops in the province, dryland corn on Black soils ranks first in planting acreage, accounting for half of total arable land in the province.
在全省粮食作物中，旱地黑土玉米播种面积位居榜首，占全省总耕地面积一半。
They decided to bring more land under cultivation.
他们决定扩大耕地面积。
The crop acreage could be quadrupled.
耕地面积可增加三倍。
the total area of the cultivated land is keeping expanding, with damages to the forest lands and grasslands;
耕地总面积持续扩大，主要来自于对林地和草地的破坏；
The Minimum Area Per Capita of Cultivated Land and Its Implication for the Optimization of Land Resource Allocation;
区域最小人均耕地面积与耕地资源调控
Analysis on the Deviation of the Farm Land Area Estimate Reported in Statistics of the Prefecture-Grade Cities in Guangdong Province;
广东省各地市耕地面积统计偏差分析
-- There is potential for increasing the yield per unit area on the existing cultivated land.
--提高现有耕地单位面积产量有潜力。
There is potential for increasing the yield per unit area on the existing cultivated land.
——提高现有耕地单位面积产量有潜力。
Analysis on the area change of cultivated land and its driving forces in Zhanjiang;
湛江市耕地面积变化及其驱动力分析
Comparative Analysis of the Models of Cultivated Land Change in Jiangsu;
江苏省耕地面积变化模型的比较分析
A CONSIDERATION ON INCREMENT AND DECREMENT EQUILIBRIUM OF CULTIVATED AREA IN CHINA;
对中国耕地面积增减数量平衡的思考
Farming is largely undertaken in the New Territories and just 2.3 per cent of the land area is under cultivation.
耕地主要在新界，面积仅占全港土地的2.3%。
The Research on the Computing Method of New Land Area in the Project of Land Exploitation and Arrangement;
土地开发整理项目新增耕地面积测算方法研究
So producing the world's current agricultural output organically would require several times as much land as is currently cultivated.
因此，目前全球农业总产量如果都来自有机生产方式，那么所需耕地面积将是现有面积的数倍之多。
This has provided valuable data for extension of cultivable land.
这样就提供了有关扩大可耕地面积的宝贵数据。
Cultivated Land Will Be Kept Above 128 Million Hectares
到2005年要确保耕地面积不低于12800万公顷
a yield 1,000 times greater than a similar area can produce using conventional open-field farming.
产量比在同等面积耕地进行常规种植高1000倍。
These new tractors get over twice the acreage that the old ones used to cover.
这些新拖拉机比旧的能多耕一倍面积的土地。