Giant Staircases Carved Into Hillsides
Rice needs plenty of water to grow well. That is easy to give a plant on flat land, where a field can be flooded. But in parts of Asia the land is steep, with few flat places. Farmers there found a way to bring the flat land to the hills. They built terraces.
A terrace is a wide step cut into a slope. Farmers dig into the hillside and build a low wall along the edge of each step. Row after row, they make a huge staircase that climbs the hill. Each step is nearly level, so it can hold a shallow pool of water around the young rice plants.
Water often arrives from a stream above the hill. It flows into the top terrace, and when that one is full, it spills down to the next. In this way, one spring can feed an entire hillside.
Terraces also protect the land. On a steep slope, heavy rain can wash good soil away. The walls and level steps slow the water and keep the soil in place.
Terraces can be found in China, Vietnam, Indonesia, the Philippines, and other lands. From far away, they look like curved ribbons of green or gold, depending on the season.