채취한 황토는 105℃로 12시간 이상 건조시킨 후 분쇄하여 100 mesh 체에 거른 황토를 실험에 사용하였다.
The collected loess was dried at 105°C for over 12 hours, then pulverized and filtered through a 100 mesh sieve, and the loess had been used for the experiment.