TPO71阅读真题+题目+答案下载：The Productivity of Wet Rice Farming

TPO71阅读真题+题目+答案下载：The Productivity of Wet Rice Farming

[Paragraph 1]The wet rice fields of Asia are the most productive of all preindustrial intensive agricultural systems. As the term "wet rice" suggests, the method involves flooding the fields for most of the growing season. In some areas the water comes entirely from the natural rainfall of the monsoons, but the water level often is controlled by artificial irrigation. Most wet rice is, therefore, grown on the floodplains of rivers. In parts of Southeast Asia, southern China, and the Himalayan fringes, wet rice is grown on terraced hillsides originally constructed centuries ago.

[Paragraph 2]Perhaps the most remarkable feature of wet rice cultivation is the capability of a plot to yield a harvest year in and year out, with little or no need to be left uncultivated for extended periods in order to recover its fertility. Indeed, where the seasonal availability of water is adequate, the same plot may yield two and even three harvests in a single year, being under almost continuous cultivation. This capability has been attributed to four factors. the protection from erosion the water gives the soil, the high water table of the inverse floodplains that reduces the leaching of nutrients from the soil, the replacement of soil nutrients by the silt carried in the rivers’ flooding, and nitrogen fixation (the conversion of atmospheric nitrogen into forms usable by plants) from the blue-green algae that live in the floodwater, The chief benefit of wet rice—its ability to grow in the same field year after year—is then related to the practice of flooding the fields and allowing the water to remain throughout most of the maturation period.

TPO71阅读真题The Productivity of Wet Rice Farming余下省略！

1、(单选题) Paragraph 1 suggests which of the following about the artificial irrigation of wet rice?

A.It is used only in areas where there is little natural rainfall

B.It is most easily accomplished when the rice fields are located on the floodplains of rivers

C.It is considered one of the most important developments of industrial agriculture

D.It was not yet in use when (he terraced hillsides were originally constructed

2、(单选题) The phrase “attributed to” in the passage is closest in meaning to

A.divided into

B.reduced

C.explained by

D.proven by

3、(单选题) According to paragraph 2, the flooding of wet rice fields is responsible for each of the following benefits EXCEPT

A.reduced erosion

B.harvests that increase yearly in amount

C.the regular addition of nutrients to the soil

D.nitrogen fixation

TPO71阅读真题The Productivity of Wet Rice Farming题目省略！

TPO71阅读真题+题目+答案三篇完整版下载，15元有偿！