首页
登录
职称英语
[originaltext] (30) "Marginal" lands might have low quality soil. Or they m
[originaltext] (30) "Marginal" lands might have low quality soil. Or they m
游客
2024-05-29
20
管理
问题
(30) "Marginal" lands might have low quality soil. Or they might be on a hillside that rises sharply. Or they might be in an area that gets limited rainfall. In any case, they are the last to be planted under good conditions and the first to be abandoned under bad conditions.
But there are uses for marginal lands. Most often they are used as grasslands for cattle, sheep or goats. A farmer might use native grasses or non-native seeds. Either way, it is important to establish good ground cover to avoid the loss of soil through erosion. But using marginal land for grazing is not as simple as it might sound Cattle can damage forage(草料) crops by eating down to the roots. Their weight also crushes the soil. That can make the ground too hard for growing. (31) A way to reduce the damage from overgrazing is to move animals from one field to another. Experts say rotational grazing like this is extremely important for marginal land.
Another use for marginal land is for tree crops. (32)Trees help support the soil. They reduce the damaging effects of wind and rain. And they can provide grazing animals with shade from the sun. Studies have shown that white pines grow well on marginal land. They grow fast and provide good quality wood There are slower-growing trees like the black walnut that provide a nut crop as well as wood Marginal lands need care. Failing to take care of them might only make a bad situation worse. But good planning can turn a marginal resource into a highly productive one.
选项
A、Supporting the soil.
B、Providing shade for animals.
C、Loosening soil structure.
D、Protecting the soil from wind and rain damage.
答案
C
解析
短文提到,在边缘性土地上种树可以提高土质,减弱风雨土壤对土壤的侵袭,并可以为牲畜提供阴凉地,但文中没有提到种树可以松土,故选C项。
转载请注明原文地址:https://tihaiku.com/zcyy/3610983.html
相关试题推荐
[originaltext]Today,IwouldliketobeginbydiscussingearlyEuropeanset
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]M:Hi,Claire.Howdoesitfeeltobebackoncampus?W:Keith,h
[originaltext]M:Hi,Claire.Howdoesitfeeltobebackoncampus?W:Keith,h
[originaltext]RecentlytheDepartmentofPlanningofNewYorkissuedarepo
[originaltext]RecentlytheDepartmentofPlanningofNewYorkissuedarepo
[originaltext]RecentlytheDepartmentofPlanningofNewYorkissuedarepo
[originaltext]Howdoyourisetothetopinbusiness?Whatpersonalqualifi
[originaltext]Howdoyourisetothetopinbusiness?Whatpersonalqualifi
[originaltext]M:Sowhat’syourtrouble?W:Well,doctor,,Ihaven’tbeenfeeli
随机试题
(1)Atacertainseasonofourlifeweareaccustomedtoconsidereveryspot
[originaltext]M:Hi,Shelley.Comeonin.W:Uh,yeah,Istoppedbytoseeify
教育的文化功能主要表现在哪些方面?
大学生自我评价的片面性表现为过高评价自我。()
叶圣陶先生曾说:“教材无非是个例子,凭这个例子要使学生能够举一反三,练成阅读和作
有关HLB值的叙述哪个为错误的A:非离子表面活剂HLB值介于0~20 B:HL
患者女性,35岁,常常在晨起及晚间躺下时咳大量脓痰,痰液分三层,为排除痰液医生建
单摆由长l的摆杆与摆锤A组成,其运动规律φ=φ0sinωt。锤A在t=π/4w秒
以下关于调査表说法中正确的是()。[2007年真题] A.调査表的目的就是
关于β系数,以下说法正确的是()。A.β系数是根据历史资料统计而得到的 B.
最新回复
(
0
)