This paper studied the mechanism of yield increase.

本文对其增产机理做了研究。

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With the increment of the density, the yield increase.

随着密度的增加，产量增加。

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This paper described the interactive effects of fertilizer and water on yield and potential yield increase of crops.

本文阐述了养分和水分对作物产量及其增产潜力的交互影响。

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But Howard-Yana Shapiro, head of plant science and external research at Mars, thinks that science could greatly increase the yield.

VOA: special.2010.10.19

The bank cites Fed research and data to conclude that a 50 bp yield increase would cut GDP growth by 0.4 percentage points.

FORBES: Is Moody's Downgrade Threat Much Ado About Nothing?

When it comes to access to food, global warming is expected to be responsible for a 7% yield decrease in the developing world and a 3% yield increase in the developed world over this century.

WSJ: Bj?rn Lomborg: Global Warming and Adaptability

The only way to increase yield was to find a way of supplying extra nitrogen, phosphorus and potassium to the soil.

ECONOMIST: The story of man's staple food