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The area of semiarid land has above 75 percent of all cultivated land in Inner Mongolia Autonomous.

1 旱作农业在内蒙古的重要地位内蒙古自治区746-3万hm2耕地中,水浇地仅184-7万hm2,旱地占耕地总面积的75%以上。

Some scholars argued that the cultivated land was not substitutable at all and others on the contrary because of different theoretical backgrounds or perspectives.

耕地面临着巨大的环境压力与需求压力。环境和需求约束下的耕地可替代性问题由此凸现。

To enclose tideland for cultivation can not only solve some problems of tidelands but also make use of the advantages of reclamation to develop cultivated land and aquatic bree...

滩涂围垦既可解决目前一些滩涂存在的问题,又可利用围垦开发耕地和发展水产养殖业等,保证耕地面积动态平衡目标的实现。

To enclose tideland for cultivation can not only solve some problems of tidelands but also make use of the advantages of reclamation to develop cultivated land and aquatic breeding, andto realize dynamic equilibrium of cultivated land area.

滩涂围垦既可解决目前一些滩涂存在的问题,又可利用围垦开发耕地和发展水产养殖业等,保证耕地面积动态平衡目标的实现。

To enclose tideland forcultivation can not only solve some problems of tidelands but also make use of the advantages of reclamation to develop cultivated land and aquatic breeding , andto realize dynamic equilibrium of cultivated land area .

滩涂围垦既可解决目前一些滩涂存在的问题,又可利用围垦开发耕地和发展水产养殖业等,保证耕地面积动态平衡目标的实现。

In order to evaluate the effect of different tillage types on soil moisture,the paper analyses the temporal and spatial variations of soil moisture under plough tillage and no-tillage.

为了揭示农牧交错地区不同农田耕作方式对其水分环境的影响过程及规律,选择翻耕地和免耕地两种土地耕作类型,分析不同耕作方式下土壤水分的时空变化情况。

The monitoring of farmland quality should be inte grated with the dynamic change of farmland area of all grades.

耕地质量的监测必须与各等级耕地面积的动态变化监测结合起来。

Drought has seriously influenced agricultural development because there are 20310 million square miters area under cultivation in the west half arid and arid ecology area which is 51.5% of total cultivation area in JiLin province.

吉林省西部干旱、半干旱生态区现有耕地面积203.1万hm2,占全省耕地面和的51.5%,干旱严重地影响了农业的发展。

The fallowing are the main conclusions:(1) The time of arable land resource sustainable use change with any factor of the agro-ecology-economic system. The temporal model of arable land resource sustainable use is dynamic model.

主要结论是:(1)耕地资源可持续利用时间随着系统相关影响因子的变化而变化,耕地资源可持续利用的时间模型是动态模型。

The conclusions of this research were as follows:(1) The main current land use structure in Neijiang city were cultivated land and the residential areas and industrial and minings land, and the ratio of cultivated land reached 47.20%. The land use ratio was much higher than average level of the whole province, reaching 79.24%, and the reserve land resource accounted for 20.76% of the whole area.

研究结果为:(1)内江市土地利用现状以耕地和居民点及工矿用地占主导地位,其中耕地面积占全区域总面积的47.20%,土地利用率达到79.24%,大大高于全省平均水平,尚可开发的后备土地资源达20.76%。

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