首页
登录
职称英语
The texture of the soil depends on the relative amounts of different-sized p
The texture of the soil depends on the relative amounts of different-sized p
游客
2025-04-25
47
管理
问题
The texture of the soil depends on the relative amounts of different-sized particles that combine to make up the soil. These particles can be as large as stone and gravel or as small as clay.
A typical clay soil is composed of approximately 60 percent actual clay, 20 percent silt, and 20 percent sand. The particles in a sandy soil are so fine that it tends to be compact and interferes with the oxygen supply for plant roots. Water has trouble entering this impervious soil, and runoff is very common during rainfalls.
A typical light sandy soil is composed of approximately 70 percent sand, 20 percent silt, and 10 percent clay. The particles in a sandy soil are comparatively large, permitting water to enter the soil and to pass through it so quickly that it often carries nutrients with it and dries out very rapidly. The texture of sandy soils is generally very difficult to modify because huge amounts of organic material must be added.
A typical loam soil is composed of approximately 40 percent sand, 40 percent silt, and 20 percent clay, making it an ideal garden soil. It is easily worked and retains water and nutrients, which fire slowly absorbed by plant roots.
A typical adobe soil is a clay soil present in hot, dry areas of the country and is often very hard and cracked. It has all the disadvantages of a heavy clay soil and, being much drier, is more difficult to correct. [br] According to the passage, the texture of sandy soil can be improved by mixing in ______.
选项
A、water
B、gravel
C、chemistry nutrients
D、organic material
答案
D
解析
作者在第四段末尾说,在一般情况下,沙土的结构很难改变,因为必须在里面添加大量的有机物质。
转载请注明原文地址:http://tihaiku.com/zcyy/4053553.html
相关试题推荐
Thetextureofthesoildependsontherelativeamountsofdifferent-sizedp
Thetextureofthesoildependsontherelativeamountsofdifferent-sizedp
Somecropsarerelativelyhighyieldersandcouldbeplantedinpreferencetoot
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,
Municipalsewageisofrelativelyrecentoriginasapollutant.Itwasfirst
Thetextureofthesoildependsontherelativeamountsofdifferent-sizedp
随机试题
Wewill______buildingworkinAugustofnextyearifeverythinggoessmoothly.A、
[originaltext]W:Doyouwanttogorunningdownbythelakeafterpsychologycl
[originaltext]Fromtheancienttimes,marriagehasbeenanimportantpartof
曾被深受罗丹赞誉的舞蹈家是邓肯。()
以下人防工程顶棚做法哪个不对?( )A.1∶2水泥砂浆抹灰压光 B.钢筋混凝
(2015年)乙公司期末存货采用成本与可变现净值孰低法计量。期末原材料的账面余额
证券投资咨询机构的从业人员不得从事的行为包括( )A:为上市公司设计经理观念股票
单侧下颌角骨折的最佳固定方法是( )。A.单颌结扎 B.颅颌绷带固定 C.
中华公司从政府无偿取得10000亩的林地,难以按照公允价值计量,只能以名义金额
可据以计算累计盈余资金,分析技术方案财务生存能力的现金流量表是()。A.财
最新回复
(
0
)