| 1. | Substantial amounts of land may have to be converted from irrigated to dryland farming systems .
大量土地可能不得不从灌溉转为旱地耕作。 |
| 2. | The rising demand for food has reduced the area fallowed in key dryland farming regions .
日益增长的对粮食的需求，使主要干旱农业区的休耕面积大为减少。 |
| 3. | China canada agriculture development program - dryland farming project
中加农业发展项目- cida项目-旱地耕作 |
| 4. | As aquifers are depleted and irrigation wells go dry , farmers either revert to low - yield dryland farming or , in the more arid regions , abandon farming altogether
随着蓄水层的枯竭和灌溉井的干涸，农民不得不改种低产的旱地作物，在更为干旱的地区，他们干脆放弃耕作。 |
| 5. | The system also designed a forum to improve the development of dryland farming and mechanization , and the communications of technicians . as an important character of the system , we can browse the drawings ( dwf files ) on the web
同时为了促进整个旱作农业技术的发展，实现了一个有关旱作农业技术的论坛，为从事、爱好旱作农用技术的人员开辟了一块技术交流天地。 |
| 6. | Viewing the dryland farm machines " parts drawings and corresponding information as application object , this dissertation present a research on the management system of parts " drawings based on web . in the dissertation the internet / intranet and database technology was used
本文主要以旱作农业机械电子版图纸为研究对象，采用inter intranet技术和数据库技术，研究和开发了基于web的机械电子版图纸管理系统，主要研究包括：分析了当前企事业单位的需求，选择了时下比较流行的b s结构进行开发设计整个系统。 |
| 7. | To fight against the ever increasing dry area and deteriorating drought situation , it is necessary and urgent to use sci - tech achievement to improve the utilization of rainfall . and this is the foundation for the sustainable development of dryland farming and rural economy in ningnan area
近年来由于水资源短缺势头难以逆转、旱情加剧，因此，借助科学技术进步，提高降水利用效率，提升降水资源化程度，就成为宁南旱区农业与农村经济实现可持续发展所要解决的重大问题。 |
