The effects of different transplanting depths combined with one-off double-layer fertilization on the growth of flue-cured tobacco and nutrient contents of soil were studied in the field experiment.
将施肥技术和栽培措施相结合，通过大田试验研究不同移栽深度结合一次性双层施肥对烤烟生长及土壤养分的影响。
Closure cover system is one of important parts of landfill site construction, it includes landfill gas discharge guiding layer, geotechnical film, drainage layer and plant cover surface soil layer.
封场覆盖系统是垃圾卫生填埋场建设的重要组成部分，覆盖系统包括气体导排层、土工膜、排水层、植被表土层。
Based on the response stress of one-dimensional soil layer, the finite element approach was improved and a response stress approach was put forward.
从地震时一维土层反应应力入手，对拟静力法中有限元反应加速度法的地震荷载加载方法进行改进，提出了有限元反应应力法。
When the sea soil layer is, softer, the greatest stress for elastic constraints is larger than that for fixed one. The difference in critical length of hanging segment is not much.
当地层较软时，弹性约束时管道中的最大应力比固定端约束的要大，而临界悬空长度相差不多。
When the sea soil layer is, softer, the greatest stress for elastic constraints is larger than that for fixed one. The difference in critical length of hanging segment is not much.
当地层较软时，弹性约束时管道中的最大应力比固定端约束的要大，而临界悬空长度相差不多。
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