A field experiment was conducted to study effects of root pruning at returning green stage on population structure, soil water and yield formation of winter wheat.

通过田间试验研究了返青期不同程度根修剪处理对冬小麦群体结构、土壤水分及产量形成的影响。

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Ganxin688 was studied for its characteristics of nitrogen absorbability and their impact on the population development and yield formation.

通过不同氮肥运筹方式，探讨淦鑫688的吸氮特性及其对群体发育和产量形成的影响。

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This article makes analysis of the factor of population in Qinghai-Tibet Plateau, and the mechanism of the formation of population and environment problems in this area.

本文就青藏高原地区的人口因素及其对该区域人口环境问题形成的机制进行了分析。

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The bad part about slow population growth is that it depresses the economy, which in turn works against family formation.

FORBES: America's Baby Bust: How The Great Recession Has Jeopardized Our Demographic Health

"We compared what you see in these galaxies with what you see in the field galaxy population, other galaxies at the same epoch and distance, and there is a stark difference - far more star formation and black hole growth, " the Cambridge University scientist and Royal Society research fellow explained to the BBC News website.

BBC: NEWS | Science/Nature | Deepest X-rays tell merger story