This brought a steady rise in the grain yield. In 2002 it nearly doubled that of 1980.
这使粮食产量不断增长，到2002年产量已经比1980年翻了一番。
This brought a steady rise in the grain yield. In 1957 it nearly doubled that for 1949.
这使粮食产量不断增长，到1957年产量已经比1949年翻了一番。
This brought a steady rise in the grain yield.
这使粮食产量不断增长。
There are many factors affecting grain yield of maize.
影响玉米子粒产量的因素很多。
Nitrogen fertilization increased grain yield significantly.
施氮后籽粒产量极显著增加。
The amount of root did not directly influence the grain yield.
但根量的多少并不直接影响产量。
The applied amount of nitrogen had a significant effect on grain yield.
施氮量对杂交稻的产量形成和氮肥利用的影响十分明显。
The LCT is the optimum leaf color at which maximum grain yield is achieved.
叶色诊断指标实际上就是稻谷产量最高时的最适叶色。
Intercropping is the most potential for increasing grain yield in arid regions.
间作多熟种植是干旱地区最具增产潜力的栽培模式。
The regulated deficit irrigation can affect both wheat grain yield and quality.
调亏灌溉在影响产量的同时，也会对收获物的品质产生影响。
The agricultural and physiological efficiencies of grain yield were maximum in calcareous purple soil.
对小麦籽粒产量的农业和生理效率以石灰性紫色土为最高。
The grain yield and protein content responded differently to the ratio of base to topdressing nitrogen.
籽粒产量和蛋白质含量对底追比例的反应有一定差异。
Rates of grain yield advances through plant breeding programs have apparently declined in recent years.
近年来，主要农作物的产量增加速率明显下降。
Effects of nitrogen rates on grain yield and quality of wheat in different soil fertility were studied.
在高、低两种肥力土壤下，研究了施氮量对小麦子粒产量和综合品质性状的影响。
Our country is characterized by large population, insufficient cultivated area, lower per capita grain yield.
我国是一个人口众多，耕地面积不足，人均粮食产量较低的国家。
Nitrogen supplying is one of the key factors that can influence the grain yield and protein content of wheat.
氮素供应是影响小麦产量和蛋白质含量的关键因素之一。
Owing to a lot of uncertain factors influencing the grain yield, its prediction has always been a difficult point.
粮食产量受到多个不确定因素的影响，它的预测历来是一个难点。
There existed positive correlation between scatteredtransplanting density and effective panicle number and grain yield.
抛栽密度与有效穗数、稻谷产量呈正相关。
In SRI condition, transplant of different leaf age (from 2 to 5 leaf age) seedlings has very small effect on grain yield.
在强化栽培条件下，不同叶龄(2—5叶龄)的秧苗移栽对其产量的影响很小。
Finally, some policies were provided in order to accelerate grain yield and optimize spatial structure of grain production.
最后提出了促进粮食生产稳定增长，优化其空间结构的政策建议。
With the increase of wheat ploidies, nutrient use efficiency for biomass and that for grain yield all increased significantly.
随小麦的进化，生物量养分利用效率和产量养分利用效率均显著增加。
The effects of different nitrogen and phosphorus application on grain yield and quality of compact corn Longdan 26 were studied.
以粮饲兼用型玉米主栽品种龙单26为试验材料，研究了不同氮、磷施用量对玉米产量和品质的影响。
The effects of different nitrogen and phosphorus application on grain yield and qualities of compact corn Jidan 209 were studied.
以耐密型玉米品种“吉单209”为试材，研究了不同氮、磷用量对玉米籽粒产量和营养品质的影响。
There were correlations between the major brewing quality characters and the economic characters on grain yield in all materials.
参试品种（组合）的主要酿造品质与经济性状间存在相关性。
Effects of different nitrogen application amount on grain yield and quality of wheat variety-Wanmai 44 (middle gluten) were studied.
研究分析了氮素施量对优质中筋小麦皖麦44籽粒产量和品质的影响。
The correlation and path action among economic characters to grain yield for 11 mainly promoted hybrid rice in Guangdong were analyzed .
本文研究了11个广东省主推杂交水稻组合主要经济性状间的相互关系及其对产量的通径作用。
The correlation and path action among economic characters to grain yield for 11 mainly promoted hybrid rice in Guangdong were analyzed .
本文研究了11个广东省主推杂交水稻组合主要经济性状间的相互关系及其对产量的通径作用。
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