Acquiring the territory would double the size of the United States at a cost in the currency of the day of less than 3 cents per acre (7 cents per ha).
购买这片土地将美国的领土扩大了一倍，按当时货币算，花费大约为每英亩3美分(每公顷7美分)。
The result showed that the technology made rice yield increase over 13%, production cost decrease over 300 Yuan per ha. The high yield and benefit from rice production was finally gained.
实践证明，配套技术的应用，使水稻平均每公顷增产13%以上，生产成本减少300元以上，达到了高产高效。
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