Ways to raise unit production of longwall face;
提高综采工作面的单产途径
Discussion on methods of increasing unit production of fully mechanized caving in relatively thinner thick coal seam;
提高较薄厚煤层综放单产途径的探讨
Some Measures for Enhancing the Corn Yield in Jilin Province;
提高吉林省玉米单产的几项措施
But different researches have obtained different results of correlation between genetic diversity and crop yield as indicated by COP.
结果表明,遗传单一性与我国玉米单产之间呈显著的负相关关系;品种单一性不一定会导致遗传单一性的增加。
The yield potential of rice in Guangdong is great with the improved varieties.
提高广东粮食的自给率，在于提高单产，重点抓好占水稻面积２／３的中低产
Increasing cassava yield per unit is the way of cassava fuel-alcohol about raw material problem;
提高单产是解决木薯燃料乙醇原料问题的出路
The accuracy of estimating per unit area yield mainly depends on the representative quality of the sample plot.
使用抽样法估计单产的准确性 ,很大程度上取决于样本块的质量。
To construct high yield and high efficiency coal mine can improve annual output,convenience disposal of drift,predigest production system.
建设高产高效矿井,不仅能提高工作面单产,方便巷道布置,简化生产系统,有利于矿井高度集中生产,而且能提高矿井整体资源回收率;近年来,王庄煤矿在高产高效矿井建设上不断进行创新与实践,矿井生产能力不断提升,2005年利用全套国产设备创造了单机单面年单产突破600万t全国先进水平,为矿井高产高效建设积累了丰富的经验,也将有力推动煤矿集约化生产技术的发展。
Introdliced the producuon and management technologies of the Daxing Coal mine increasing unit yield and its digging,and building high yield and high efficiency mineral well,and introduced the experience of the mechanization apply level and basic mange.
介绍了大兴煤矿提高单产单进,建设高产高效矿井的生产管理技术,机械化应用水平和基础管理等方面的经验。
Way of lifting the per unit area yield at mechanical mining face with single-ended machine in the middle and thick seam;
中厚煤层单滚筒机采工作面提高单产的途径
The article analyses China s grain comprehensive production capacity by using data of China s grain production from 1983 to 2005 and selecting the two major indicators of grain acreage and grain yield.
文章运用1983～2005年我国粮食生产的有关数据,选取粮食播种面积和粮食单产这两个最主要的指标对我国粮食综合生产能力进行分析,认为我国粮食生产仍处于规模收益递增阶段,单产是影响我国粮食综合生产能力最主要的因素,其次是粮食播种面积,农业的抗灾能力对粮食生产的影响不显著。