查询词典 yield gap

The conclusions are as following: The fluctuation of purveyance production is related with grain yield, especially the production of maize is the dominant factor. Analyzed from the viewpoint of the crop construction, the fluctuation of grain yield is related significantly with both grain yield per hectare of maize and wheat and the planting area of maize and rice.

研究发现：这种波动与主要粮食作物的产量密切相关，其中玉米产量的影响最大；从种植结构上分析，粮食产量的波动主要来自玉米和小麦的单产以及玉米和水稻种植面积的变化。

By the research of 'reselection of high-yield clones of Pinus massoniana', 58 fast-growth and high-yield clones were selected. Their genetic gains were 51.29%(the highest was 116.82%), and could be used to build high-yield seed orchard of Pinus massoniana.

通过"马尾松高产无性系再选择研究"，筛选出58个速生、高产无性系，平均遗传增益达51.29%（最高达116.82%），可用于营建马尾松高产种子园。

These results proved that the secondary electron emission yield of insulator measured with the device is credible, but the yield of MgO is smaller than the normal yield of MgO.

这表明该装置测量的绝缘体二次电子发射系数是可信的，但用磁控溅射法制备的MgO的二次电子发射系数较低，这可能是制备MgO时引入了过多的杂质在MgO二次电子发射体里面所引起的。

Using quadratic rotational regression combination design to study the influence on yield and economic characters in different fertilizer and density of the rape, the result showed that the influence of density and fertilizer on yield and active silique per plant were significant but the quantity and weight of seed, while the influence of density on active silique per plant was higher than that of fertilizer but on yield was contrary.

结果表明，在本试验范围内，施肥量和密度对油菜单株有效角果数和产量均有显著的影响，对单株有效角果数的影响是密度大于施肥量，而对产量的影响则是施肥量大于密度；单株有效角果数的最佳组合为施肥量以纯氮227.0kg/hm2、密度9.4万株/hm2，产量的最佳组合为施肥量以纯氮235.7kg/hm2、密度10.6万株/hm2；当控制施肥量、密度分别为214.4—256.9kg/hm2、10.1—11.1万株/hm2时，油菜产量可达3000kg/hm2以上。

Comparisons are performed of climate resource availability, single-crop yield, the total yield, yield component, economic and ecoogical benefit between double-harvest and the triple-harvest cropping systems.

对三熟制与二熟制的气候资源利用、组分产量和产量结构进行对比，分析经济效益和生态效益。

Through the analysis on the history data, we find out the rule that precipitation how to effect on wheat yield in summer, and how to estimate the wheat yield trend of next year. It is important to direct the wheat production, and to promote the wheat yield.

通过对历史资料的分析，找出夏季降水对小麦产量影响的一般规律，进一步找出利用夏季降水的丰缺程度对翌年小麦产量趋势作出预测的方法，对于指导小麦生产趋利避害，巧用气候资源，合理组装小麦生产的配套技术，以及最大限度的利用自然降水资源，促进小麦单产大幅度提高，具有十分重要的意义。

Very high yield, with super high-yield can sweep the Board 400III 昆腾 to plate machine automation functions which you can easily reach 50 per hour production of ultra high-yield: jy200l31(20kva) V speed: 43％ Zhang per hour, if equipped with continuous on automatic devices or devices up to 50 pieces of plate jy200l31(20kva) can be equipped with devices jy200l31(20kva) ContinuousLoad apolegamy automatic devices to achieve greater automation: the device can be loaded without a liner produced 50 per hour and 50 can be produced.

极矮不销度，超矮不销能借助全败400III昆腾间接制版机的被迫冻功用，用户可沉重到达每小时出不销50弛印版的超矮不销度：◇V速率：每小时43弛印版，若配备不断上版安装或被迫上版安装可达50弛印版◇可选配不断上版安装◇选配被迫上版安装可得回更矮的被迫冻：该安装可装载无衬纸的印版50弛，每小时可出不销50弛印版。

For this reason, the generic term yield stress is used, and it can mean either yield point or yield strength.

基于这个原因，一般是用名词产生压力，可以说是屈服点或屈服强度。

To help understand the concept of risk, the adviser points out that the stock S1, with average annual yield of 6% over the 12 years but minimal spread on yield, would probably be less risky than stock S4, which has a 12.5% average yield but appears quite volatile.

为了帮助理解风险的概念，该顾问指出，股票一，年均收益率为6 ％的12年，但最低限度蔓延的产量，很可能是风险小于股票中四至中，有 12.5 ％的平均收益率，但似乎很不稳定。

The yield of production test is 2 214.4 kg/hm~2, increasing yield by 12.6% compare to CK. soybean ; hefeng 43; high and stable yield ; breed selection and spread

针对黑龙江省大豆生产特点与存在的问题，积极选育高产稳产、抗病、优质、适应性广、适宜机械化收获的大豆新品种，是解决

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。