A 8 years long term experiment was conducted on the high yieldarea of plain at the foot of Yanshan mountain.
通过连续8年长期定位试验，研究了不同施肥方式对燕山山麓平原高产粮区褐土土壤肥力和作物产量的影响。
2
The economical volume of rainwater storage basin of different runoff yieldarea were calculated by converting area of residential districts with different scale and component.
同时，通过折算不同规模和组成的小区的占地面积，确定了不同产流面积下的雨水蓄水池经济容积。
3
But this could actually yield some fantastic results, especially if it was an area where rubbish was thrown or the cesspit was located.