"Having dug the [irrigation] channels, they levelled the fields and squared them so that the irrigation water could be adequately distributed," he wrote. "They built terraces on the mountains and hillsides, wherever the soil was good… In this way the whole hill was gradually brought under cultivation, the platforms being flattened out like stairs in a staircase and all the cultivable and irrigable land being put to use."
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สาระสำคัญ การเรียนรู้
โพสต์โดย : iceeci
