可耕的

The cropland to grassland conversion plays an important role in the improvement of agro-ecosystem productivity and sustainable development.

退耕还草对北庄农业生态系统生产力的提高和系统的可持续发展起到了积极的作用。

This paper analyzes the main problems of agricultural development in the southern area of Ningxia province, summarizes the 20-year experiences of the experimental zone in the area, and puts forward four different models of eco-agriculture, fruit-vegetable model, fruit-seedling model, grass-fruit-livestock.

针对宁夏南部退化山区农业发展中存在的主要问题，在总结试区多年工作经验的基础上，提出了适合于当地农村经济发展的4种生态农业模式，系统分析了各种生态农业模式的经济、社会和生态效益及其推广前景，为半干旱山区退耕还林还草和农业可持续发展提供科学依据与实践基础。

In terms of the content, the research items include designing and testing six rows no-till wheat planter with whole profile modeling and include researching an opener of stagger double discs.

从内容上来看主要可分为六行整体仿形小麦免耕播种机的设计与试验研究和错开式双圆盘开沟器的探索研究。

The ratio of irrigated area to cultivated area,the number of electromechanical wells per each effective irrigational unit,the coefficient o...

结果表明：灌耕比、单位灌溉面积机电井数、土壤有效保水系数、农机动力系数等4个因子可以作为全省农业综合抗旱能力评价的指标；全省农业综合抗旱能力可以划分为高、中、低值区，其中，高值区主要分布在豫中、豫北的大部分地区；中值区比较分散，主要包括中西部低丘、缓岗区，平顶山东部、驻马店及信阳西南部，开封东部-商丘地区，林州-辉县县区；低值区又可分为2个小区，主要包括三门峡、洛阳中西部及南阳地区，信阳中部及东部。

Under intensive cropping with retention of crop residue management regimes, soils can become suppressive to Rhizoctonia root rot.

保留作物残体的精耕栽培制度可使土壤变为对病害有抑制作用的抑病土。

Rotary seeder is our country's large area is to promote the development of new high-efficiency agriculture machine, our country's agriculture is an important part of sustainable development.

旋耕播种机是我国正在大面积推广发展的新型高效农业机械，也是我国农业可持续发展的重要内容。

The purpose of this study is to develop an economic model that includes Government Rice Purchasing, Set-Aside, and TRQ policies. Alternative rice policies are simulated through this model.

本研究之主要目的在於建立一包含保价收购制度、水旱田休耕政策以及关税配额的进口贸易方式等三种稻米政策之经济模型，透过此经济模型的建立可模拟各种稻米政策调整之经济影响。

It urges a reforesting of cleared areas and promotion of reduced impact logging and sustainable agriculture to slow or reverse damage to the rain forest.

该报告呼吁进行退耕还林，发展低影响的砍伐和可持续农业，以此来减少或者扭转对热带雨林的破坏。

The field test shows the Method of efficient mixing-compression and filtration deposition in order-deep oxidation is the most effective one to treat the drilling waste water in West Sichuan area, which can reach the state first level drainage standards of industrial waste water. The solidification techniques of waste mud can make the waste mud meeting the requirements of strength and environment, which can be put into agricultural fields.

现场试验应用证明：高效混凝－压滤－分级沉降－深度氧化法是处理川西钻井污水有效的方法，可以达到国家工业污水一级排放标准；废泥浆固化技术可以使废弃泥浆达到强度及环保的要求，可实现覆土还耕。

This paper anysises the interplay between economy and environment ,and based on the sustainable development theory, puts forward a few countermeasures for exploiting water resource, developing irrigated farm, realising stable self supply of grain, returning farming to ...

本文对其经济与环境间的相互影响进行了分析，并以可持续发展为理论基础，提出了开发水资源，发展灌溉农业，实现粮食稳定自给和退耕还牧，改善生态环境的发展对策。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。