查询词典 open up wasteland for farming

And the traditional plough-rake-harrow farming system for dry land was formed.

魏晋南北朝时期北方农业的进与退为网络搜集整理，原创性较弱。

Different dry farming and water retention covering had better effectiveness of siol water content.

不同旱作保水措施对龙廷杏梅园地具有良好的土壤水环境调控效应。

Dry farming irrigation farmingand the cattle and sheep herding are the main cativities of the Great Plains of the American West.

旱地农业，灌溉农业和牛羊牧业是美国西部大平原地区的主要活动。

Nitrogen leaching to the groundwater is one of the major nitrogen loss ways in dry land farming systems,and contributes to a large extent in groundwater pollution.

渗漏流失是旱地农田氮素流失的主要途径之一，也是引起地下水污染的重要原因。

Different dry farming and water retention covering can regulate soil temperature.

不同旱作保水措施对龙廷杏梅园地具有调节土壤温度效应。

This revolution was primarily a dry farming operation with springs and shallow hand-dug wells supplying domestic needs.

这次革命主要是旱田耕作而以泉水和人工开挖浅井提供生活用水。

The effect of irrigation on the yield of wheat and water utilization under limited irrigation was studied in the hilly dry farming in the west of Henan province.

在河南省丘陵旱作区，采用限量灌溉的方法，研究了灌水对冬小麦子实产量和水分利用的影响。

The author has pointed the cons- eguences from extremly exploiting underground water for recent years,and has proposed that if we make reasonably use of the existing sources of the water,it is feasible and necessary to develop dry farming.

作者针对这些特点指出了近几年由于过度开采地下水所出现的后果。进一步提出了"在科学地、合理地利用现有水资源的基础上，走旱地农业之路"的可行性和必要性。

Maize is one the main dry farming crops which is the most important source of food and forage,and it plays an essential role in agricultural production and natural economy.

干旱缺水影响农作物的播种、出苗、以至产量，是制约农业持续发展的重要因素。

Protection of the world to promote better farming techniques dry large agricultural country such as the United States, Australia and other countries in the no-tillage wheat seeder two major technologies, to address the anti-wheat no-tillage planter and so on.

目前世界上保护性耕作技术推广较好的旱作农业大国如美国、澳大利亚等国在小麦免耕播种机上主要采取两种技术，以解决小麦免耕播种机的防堵等问题。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。