If the coupon rate is less than the yield to maturity, then the bond will sell at a discount to par value.
如果票面利率低于预期收益, 那么债券会折价发行。

Effect of planting date, plant density and nitrogen application rate on yield and quality of vegetable soybean.
播期、密度、氮肥用量对菜用大豆产量和品质的效应

Relations between Leaf Photosynthesis Rate and Yield of High Yield Cotton Field in Flowering Boll forming Stage
高产棉花花铃期叶片的光合速率及影响因素与产量的关系

Effects of Nitrogen Fertilizer Rate and Ratio of Base and Topdressing on Winter Wheat Yield and Fate of Fertilizer Nitrogen
施氮量和底追肥比例对冬小麦产量及肥料氮去向的影响

Increasing the organism fertilizer in the chestnut park soil could lower the rate of the empty seededness, increasing yield.
栗园土壤增施有机肥能降低空苞率，提高产量。

Effects of Nitrogen Rate and Ratio of Base Fertilizer and Topdressing on Uptake, Translocation of Nitrogen and Yield in Wheat
施氮量和底追比例对小麦氮素吸收转运及产量的影响

Effect of different rate of nitrogen application and ratio of base and top application on yield and quality of strong gluten wheat
不同施氮量和底追比例对强筋小麦产量和品质的影响

To increase the yield rate of quarter sawn lumber, a doublecircular sawing technique was developed and fully described in this paper.
为提高径切板的出材率, 研究出双联圆锯制材技术。

Effects of different phosphorous fertilization rate on crop yield and soil phosphorous potential fertility at lower reaches of Liaohe River Plain
下辽河平原不同磷肥用量对作物产量及潜在养分的影响