查询词典 fertile farmland

Two years ago Francis worked with the Conservancy to include his farm in a county farmland protection program.

距离高楼林立的曼哈顿和费城两小时车程的地方，栖息着一些世界上最大的黑熊。

County's forest coverage rate of 60% to a farmland water quality standards for the development of the green, pollution-free, organic products provide a good ecological conditions.

全县森林覆盖率达60%，农田水质达到一级标准，为发展绿色、无公害、有机农产品提供了良好的生态条件。

In the recent 50 years, farmland ecosystem in Sanquan town develops from simple food production to diversification ecosystem with continuous increasing in multiple crop index and continuous expanding in paddy field area.

近50年来，南川市三泉镇农田生态系统由单纯的粮食生产系统向多种经营生态系统发展，复种指数不断上升，水田比例不断提高。

This paper, by establishing some functions between theoretic unit production of standard crop and natural quality of farmland graduation, and between feasible unit production of standard crop and utilization index, verifies the theoretic unit production, feasible unit production, and based on this, the regional theoretic unit production, regional feasible unit production.

通过建立农用地分等单元标准粮理论单产和自然质量等指数的函数关系、标准粮可实现单产和利用等指数的函数关系，分别核算分等单元的理论单产及可实现单产，以此为基础核算区域理论产能及可实现产能。

We took administrative districts at the county level as valuation units, estimated the current economic values of 7 ecosystem services (gas diversification, organism production output, and climate control conservation of water supply, soil formation and conservation, and environment purification, maintenance of organism culture and enter) for 6 biomes (forest, grassland, desert, farmland, wetland, and city).

以县级行政区为评价单元，核算了森林、草地、荒漠、农田、湿地和城市6大类和气体调节、水源涵养、土壤保持、环境净化、生物多样性维护、生物产品产出、文化娱乐7个方面的生态服务价值。

Result showed that, with the controlled facility, the water storage is about 19×10^3 m^3/km of in the main drainage canal, the groundwater table in farmland is raise about 0.3 to 0.5 m and the crop water use is increased about 50 to 80 mm comparing with the non controlled main drainage canal.

结果表明，单位长度大沟年调蓄水量为1.9×10^4立方公尺/km左右，其影响范围内的农田地下水位较无控制大沟平均抬高约0.3~0.5 m，每年可增加作物对地下水的直接利用量50~80 mm，区域年农田水资源调控总量110 mm左右，约占当地年均降雨量的13%；只要控制合理、管理得当，不会因此而影响排水系统对农田涝渍的有效控制或降低原有排水工程的除涝降渍标准。

Based on experimental data from laboratory and field experiments, the relationship between rainfall recharge and groundwater level under farmland drainage is analyzed in this paper.

以室内一维土柱试验和室外水平衡小区观测资料为基础，对农田排水条件下降雨入渗补给与地下水埋深关系进行了分析，根据降雨、蒸发与地下水埋深关系相似的规律，仿照国内外排水计算中较为广泛应用的阿维里扬诺夫经验公式的结构形式，建立起降雨入渗补给与地下水埋深的关系，并采用室内外试验资料对该关系式进行了验证。

The mid-1960s to mid-1970s, Yanqi oasis farmland increased in a lower level and drainage measures gradually improved so that agricultural land area of heavily salinity reduction.

60年代中期到70年代中期，焉耆绿洲耕地面积增速减缓和排水措施逐步完善，使得农耕区重度盐渍化土地有所减少。

Have a registered capital of 3,588,000 yuan, five million yuan in fixed assets, 6,000,000 yuan of liquidity, can provide you with tap water, farmland irrigation pipes, sprinkler irrigation, drip irrigation, long-distance pipe water supply projects and facilities.

拥有注册资金358.8万元，固定资产500万元，流动资金600万元，可为您提供自来水、农田管灌、喷灌、滴灌、远距离供水工程的管材及配套设施。

In natural vegetation area, where mainly are forest land, the yearly relative humidity and precipitation of spring are the driving forces to the change of NDVI. In brush and shrub area, the change of NDVI is driven by the precipitation and relative humidity of autumn. In grassland and rare tree bush grassland district, the main driving forces are human factors, and the driving mechanism is that farmland and cropping sown area are negative to the change of NDVI, but society factors are positive.

对于以林地为主的自然植被区植被覆盖变化，主要受到春季降水、春季湿度和年均湿度的正驱动，黄淮海地区的北部主要为干旱、半干旱区，因此春季降水偏多会利于植被生长；灌丛和萌生矮林区，秋季降水和秋季湿度对其植被NDVI变化呈负驱动；草原和稀树灌木草原区植被覆盖的变化，耕地面积、作物播种面积对之为负驱动，而其他社会经济因子则为正驱动。

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。