One such practice might be the use of “fertilizer trees”. These are fast－growing trees and shrubs(矮树丛) whose leaves and roots help make soil richer.

　　Oluyede Ajayi，the leader author of the study，said “Basically these are trees that can fix nitrogen(氮) from the atmosphere and change them into nitrates(硝酸盐) for fertilizer，for organic fertilizer，for the soil.”

　　The farmers who planted fertilizer trees reported double the corn production of other farmers.In Zambia，the fertilized fields provided up to 114 additional days of food.Farmers say they need less rainwater if they use fertilizer trees.The trees reduce water runoff and soil erosion.

　　A recent study found that about 400,000 farmers in southern Africa are using them.The farmers themselves designed and managed part of the testing in the field，and spread the word of their successes.

　　Fertilizer trees can be used to increase food production

　　Problems ●World population growth 1.__________ the increase of world food production

　　●Large parts of global land 2.____________ by losses of soil quality and water resources，slowing production rates

　　●New agricultural technology is 3.____________ to land and water

　　4.______

　　______ Growing fertilizer trees to expand food production without 5.____________.

　　6.____________ of fertilizer trees ●Having leaves and roots 7.____________ soil

【2016届高三（牛津版）英语一轮复习课后达标检测3 Unit 3《Looking goodfeeling good》】相关文章：

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit2《Healthy eating》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit5《The power of nature》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit5《Canada》

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修7 Unit 4 Sharing

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修8 unit3《Inventors and inventions》

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 3《Looking good feeling good》课时跟踪检测A卷（含解析）

★ 2014届高考英语一轮复习课时作业(四十六)选修8Module 4《Which English？》（外研版）

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修5 Unit 2 The United Kingdom

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 3《Looking good feeling good》单元检测（含解析）

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块5 Unit 3《Science versus nature》