A 3-d dynamic displacement field is studied and tested by use of two sets of rotation aperture spackle photographic system.
采用两套旋转孔径散斑照相系统对动态三维位移场进行了研测。
The fate of nitrogen fertilizer in current crop and succession crops in winter wheat and summer maize rotation system were studied using field 15n micro-plot.
采用田间微区15n示踪试验研究了肥料氮在冬小麦、夏玉米当季和后茬的去向。
The fate of nitrogen fertilizer in current crop and succession crops in winter wheat and summer maize rotation system were studied using field 15n micro-plot.
采用田间微区15n示踪试验研究了肥料氮在冬小麦、夏玉米当季和后茬的去向。
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