“在上一课所讲的水稻试验设计中,我们已找到了正交拉丁方的方法。例如:在一块正方形的土地上,种植A、B、C三种不同的水稻,我们就可以安排在如图1的方案中去种植。”柳博士一开始,就小结了上一课的内容,“现在,除了试验水稻品种外,我们还要试验三种化肥a、b、c的功效,那么,图1的那块种植了水稻的土地上,怎 “We have found a way to orthogonalize Latin squares in the rice trial design we covered in the previous lesson. For example, planting three different rice types A, B, and C on a square of land can be done at Planted in the plan of Figure 1. ”Dr. Liu summed up the previous lesson from the beginning," Now, in addition to testing rice varieties, we have to test the efficacy of three kinds of fertilizer a, b, c, then, On the land planted with rice in Figure 1, how