A documentary about agriculture landscape shapes in China (and the big wall of course). It’s all about man-made huge structures that can only be observed it the full splendor from a big height. Enjoy.
Agriculture is the most important economic sector of China, employing over 300 million farmers- nearly half of its work force. China ranks first in worldwide farm output, primarily producing rice, wheat, potatoes, sorghum, peanuts, tea, millet, barley, cotton, oilseed, pork, and fish. About 75% of China’s cultivated area is used for food crops. Rice is China’s most important crop, raised on about 25% of the cultivated area. The majority of rice is grown south of the Huai Ri’ver, in the Yangtze valley, the Zhu Jiang delta, and in Yunnan, Guizhou, and Sichuan provinces.
For agricultural purposes the Chinese had invented the hydraulic-powered trip hammer by the 1st century BC, during the ancient Han Dynasty (202 BC-220 AD). Although it found other purposes, its main function to pound, decorticate, and polish grain that otherwise would have been done manually. The Chinese also innovated the square-pallet chain pump by the 1st century AD, powered by a waterwheel or an oxen pulling a on a system of mechanical wheels. Although the chain pump found use in public works of providing water for urban and palatial pipe systems, it was used largely to lift water from a lower to higher elevation in filling irrigation canals and channels for farmland.
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