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  3. Production of Rice Rice gives more (35) per hectare than other cereal crops and production has increased over 100% in rec

Production of Rice Rice gives more (35) per hectare than other cereal crops and production has increased over 100% in rec

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问题                     Production of Rice
    Rice gives more  (35)   per hectare than other cereal crops and production has increased over 100% in recent years because of better yields. Land area has only increased by 30% due to the need for wet land so availability of land is quite limited by  (36)   type and  (37)   supply. The dry-land variety gives poorer yields and poorer  (38)   No weed killers have been developed yet that do not harm the main crop. Heavy machines are unable to work in paddy fields so most rice is still grown  (39)
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