利用来自二级抽样的玉米品比试验资料，对抽样方案进行了讨论。

Making us of the datum of maize variety comparative test by twi-sampling, the sampling scheme was studied.

youdao

利用来自二级抽样的玉米品比试验资料，对抽样方案进行了讨论。

Making us of the datum of maize variety comparative test by twi-sampling, the sampling scheme was studied.

youdao