A. Because it can waste more water. B. Because it is easier to operate for farmers. C. Because it can deliver water precisely to plants' roots and reduce water waste. D. Because it is the cheapest irrigation method. 相关知识点: 试题来源: 解析...
was built in the third century BC. Its uniqueness is that it does not need dikes to regulate water flow. For more than 2000 years, it has been playing an effective role in flood control and irrigation, making Chengdu Plain a fertile land free from drought and flood...
Why is farming considered the beginning of the Neolithic Revolution? Why were children sacrificed in the Incan Empire? Why was irrigation important in Mesopotamia? Why was Peru settled after Mexico? Why did Cortes want to conquer the Aztecs?
This article to current agricultural microclimate target and so on farmland temperature, humidity, solar radiation, wind speed and CO2 flux research present situations has carried on the brief summary, has discussed factors emphatically and so on planter way, irrigation processing to the crops growt[...
Nowadays star chasing is prevalent among many teenagers. Theytake pop stars as their idols, imitating their way of talking, following theirstyle of dressing, and seeking every chance to meet them in person at greatexpenses. 听力长对话(第2套) ...
a非常荣幸认识你 英文 Is honored extremely knows your English[translate] amit Mistel+WeiBdorn 与Mistel+WeiBdorn[translate] ahyperlux 翻译 hyperlux Translation[translate] a友谊是世界上最重要的东西 The friendship is in the world the most important thing[translate] ...
Since the new century, our country's communitive event has presented the fast growth tendency, becomes the influence society harmonious stable important attribute, has already aroused society's widespread interest.[translate] aif it's been lived in 如果它是居住的在[translate] ...
Disconnected floodplains then have to be irrigated, and when irrigation water comes from groundwater aquifers, we risk overdrafting them, and aquifer compaction results. And a compacted aquifer in the basin cannot be recovered,” he says. “The compaction of global aquifer basins is irreversible....
a他建于2000多年前,而且今天在灌溉方面仍起着重要作用 He constructs in more than 2000 years ago, moreover still was playing today in the irrigation aspect the vital role [translate] a那座城市距离青岛有多远 That city has from Qingdao far [translate] a用艺术的眼睛看世界 Looks at the world ...
This means that the air that passes over the mountains is dry, creating a rainshadow. The region to the east of the Rocky Mountains is in a rainshadow, though there are many important rivers that traverse the region. This means that crops are often produced through irrigation....