| Abstract: |
English summary on page 76 as follows: The wet-rice planting did exist among the ancient Viet some about ten thousands years and had gone through two stages of evolution: 1. Without the draught power, corresponding to the Neolithic 2. Using the draught power, corresponding to the Bronze and Early Iron ages In the former stage the Wet-rice planting was somewhat casual, scattered and got timidly its appearance beside the occupational site, being confined in narrow valleys next brooks, in marshy lands and inundated fields. Agricultural implements such as axes, adzes, spades of stone were shown more appropriate than stone hoes. The later stage shopuld be divided in three subs-stages: - in the second millenium BC, there appeared the ploughshare of stone and wood (Bronze age) --in the first millenium BC., the bronze ploughshare (Early Iron age) --in the full iron age, the iron ploughshare.
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