Land leveling

Effectiveness Evaluation and Combined Application of Land Leveling Technologies

农田土地平整方法的组合应用及效果

Research on the Application of Large Scale Topographic Maps to Land Leveling

大比例尺地形图在土地平整中应用的研究

Study and Test of Hydraulic Control Device in Laser Land Leveling Machine

激光平地机液压控制装置的设计与试验

Laser Control Techniques in Farm Land Leveling and Analysis of Its Application

农田激光控制平地技术及应用前景的探讨

Research & Development on Receiver and Controller for Laser Controlled Land Leveling System

激光控制平地系统接收和控制装置的研究与开发

Research and Development on 3-D Intelligent Topography Measurement System for Land Leveling

支持激光控制平地作业的智能三维地形测量系统的研究开发

Research progress on the application system of laser-controlled precision land leveling technology

激光控制农田土地精细平整应用技术体系研究进展

Land leveling is an important measure for improving the surface irrigation .

平整土地是一项改进田间地面灌水质量的重要措施，作为世界上最先进的土地平整方式&激光平地技术已在欧美发达国家广泛应用。

At present , land leveling of the new school site is in progress .

目前，该学校新校址正在搞土地平整。

Study and test of the control technology for the laser-controled land leveling system

激光控制平地系统控制技术的研究与试验

A laser land leveling technology is application in the harvester in the paper .

文章是关于激光测平技术在收盐机应用的方案设计。

Application of Laser Land Leveling Technology on the Harvester

激光测平技术在收盐机上的应用

Earthwork Calculation of Land Leveling Based on GPS Discrete Elevation Points

基于GPS高程离散点的土地平整土方量计算方法

Research on Surface Soil of Land Leveling Questions and Countermeasures in Hilly Regions of South China

浅析南方丘陵地区土地平整中的表土问题及对策

Research on the Farm Land Leveling Design and Suitability of Laser Control Technique in Land Leveling

农田土地平整设计与激光控制土地平整技术适用性研究

Laser receiver was a key component of the laser-controlled land leveling system .

激光接收器是激光控制平地系统的关键部分。

Laser Receiver Used for Laser-controlled Land Leveling System

激光控制平地系统激光接收器设计与试验

Field Computer System for Laser-controlled Land Leveling

用于激光平地作业的农田计算机系统的开发研究

Effect of laser-controlled land leveling and baby rice seedling direct planting on saving water

激光平地乳芽直播节水效果的研究

The main contents of this paper are as follows . ( 1 ) The analytical framework of optimal design for land leveling project .

主要内容有：（1）土地平整工程设计优化研究的理论框架。

Extensive land leveling is often required because the topography must be smoother than for furrow irrigation .

由于畦灌的地形必须比沟灌的平坦，因此，常常需要大面积平整土地。

Third , with land leveling , rural landscape including paddy fields and rainfed land changed since the shape became regular .

土地平整工程显著改变了水田和旱地的农田景观，田块形状趋于规整。

The conclusion is drawn that the initial depth of 3 - 4 cm of land leveling is the best occasion for using laser control technique in land leveling .

结论认为：田块初始平整度在3～4cm时为激光控制平地技术最佳使用时机。

The cost of land leveling is offset by the low labor requirement for turning water into a few border rather than into many furrows or corrugations .

把水放入几块畦田比放人许多灌水沟或垄沟花费的劳力要少，这就补偿了平整土地的费用。

Laser-controlled land leveling system is an important tool for precision surface irrigation . It can obviously improve the land leveling accuracy and seedbed conditions on the field , achieve a high quality of surface flood irrigation .

应用激光平地技术可明显改善农田表面的平整精度和种床条件，提高地面灌溉质量，是建设现代节水农业的一个重要工具。

Tiny landform had evident influence on salinity content in 1 m layer . A centimeter step difference caused apparent change in soil salinity , which indicates that land leveling was a very important measure in management of coastal saline soils .

海涂地的微地形对土壤1m土体含盐量有明显影响，几厘米的高差就可导致土壤含盐量的明显差异，这说明土地平整是海涂土壤改良的一项重要措施。

And considering the characteristics and parameters of middle power tractor hydraulic system in common use in our country , as well as the task requirements of land leveling machine , an appropriate hydraulic control device is developed with the use of the thread cartridge valves .

基于我国常用中等功率拖拉机液压系统的特性和激光平地机的工作性能要求，提出了液压控制系统的方案和构成，并确定以螺纹插装阀为主的液压集成块结构作为液压控制装置。

Application of DEM to Land - leveling Operation in Water Saving Irrigation

DEM在节水灌溉工程的土地平整及辅助设计中的应用

Under the satisfaction of each technologic standard concerned with agro road and plot , the mathematic model can automatically divide field into plots and determine land surface elevation after leveling , give an earthwork quantity of agro road and land leveling conveniently .

在满足农道及耕区各项技术标准的条件下，该模型可自动地划分耕区和确定田面平整高程，方便地给出了农道及土地平整工程量。

The difficulty and countermeasure on land levelling in Fujian Province Earthwork Calculation of Land Leveling Based on GPS Discrete Elevation Points

我省土地平整工程实施的难点与对策基于GPS高程离散点的土地平整土方量计算方法