File:Farmers of forty centuries - Field covered with piles of canal mud.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:02, 3 October 2019 | 1,475 × 1,556 (576 KB) | Bob Burkhardt | {{Information |description ={{en|1=China: Section of field covered with piles of canal mud recently applied at the rate of more than 70 tons per acre; taken out of the canal up the three flights of earth steps shown in the lower part of the figure.}} |date =published 1911 |source =F. H. King, ''Farmers of forty centuries'', 1911, p. 171. |author ={{Unknown|Photographer}} |permission ={{PD-1923}} }} 171 [[Category:Agr... |
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