阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式(不超过三个词)。People eat rice all over the world
Rice {#blank#}1{#/blank#} (believe) to have been first grown in China or possibly somewhere else in eastern Asia around 10,000 years ago. {#blank#}2{#/blank#} earliest evidence of rice farming comes from a 7,000-year-old site near the lower Yangtze River village of Hemudu in Zhejiang province in China.
Rice is a kind of food which requires much labor. In developed countries, the planting and harvesting is done {#blank#}3{#/blank#}(most) with machines. {#blank#}4{#/blank#}, in much of the world, these things are still largely done by hand. It takes one farmer 1,000 to 2,000 working hours {#blank#}5{#/blank#}(raise)a rice crop on 2.5 acres of land. The fact that rice needs so much labor means{#blank#}6{#/blank#}(keep)a lot of the population on the land.
Rice is also a crop {#blank#}7{#/blank#} need of lots of water. The wet rice grown in most of Asia needs hot weather after a period of rain and conditions provided by the rainy seasons affect many of the places {#blank#}8{#/blank#} rice is grown.
Rice straws(稻杆){#blank#}9{#/blank#}(leave)in the fields add nutrients(营养物)to the soil after rice is harvested(收割). For the next crop, rice farmers can often enjoy a good harvest by adding little {#blank#}10{#/blank#} no fertilizer.(肥料)