Only once. When it has been cut down it does not sprout up, and grow grain again.
You need to get a grain of rice seed and plant it, to get more rice. You can only harvest the crop once.
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once a year
Maybe because you can get more of it that way than you can if you harvest it when it's ready and then leave the land empty until the same time next year.
156875312 is 1 times 2 times 2 for 64 times
World average - about 4 tonnes per hectare, world record - about 10. Yield is complicated by the fact that 2 crops per year is common, and 3 are possible under ideal weather and field conditions. Crop scientists estimate a realistic maximum for the "perfect" hybrid variety at over 20 tonnes per hectare.
it is a farm equipment used to harvest rice. In general, rice harvester can be divided into walking type and driving type to satisfy different requirements. and the appearances and working principles are quite different with each other.