采用随机区组设计，三次重复。
设计：完全随机区组设计。
本文提出了一类新的区组设计———差集偶的概念。
A special class of difference set pairs is equal to the perfect binary arrays pairs.
本试验采用随机区组设计对优质稻施肥水平进行研究。
The levels of fertilizer application in quality rice was studied.
本试验采用单因子完全随机区组试验设计。
The completed random of single factor was introduced to this experiment.
本试验采用单因子完全随机区组试验设计。
The completed random of single factor was introduced to this experiment.
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