首页
登录
职称英语
Soil quality is one of the most basic and perhaps least understood indicato
Soil quality is one of the most basic and perhaps least understood indicato
游客
2023-11-18
11
管理
问题
Soil quality is one of the most basic and perhaps least understood indicators of land health. Soil supports plant growth and represents the living reservoir that buffers the flows of water, nutrients, and energy through an ecosystem. Soil quality refers to the capacity of a soil to perform these beneficial functions and is determined by its texture, structure, water-holding capacity, porosity, organic matter content, and depth, among other properties. Because soils naturally vary in their capacity to perform these functions, we must tie our understanding of soil quality to landscapes and land use. We must understand soil quality for two important reasons: First, we must match our use and management of land to soil capability. Second, we must establish baseline understanding about soil quality so we can recognize ongoing trends. If soil quality is stable or improving, we have a good indicator that the ecosystem is sustainable. If soil quality is deteriorating, the larger ecosystem will almost certainly decline with it.
People describe soil types in all kind of ways such as beavy, light, sandy, clay, loam, poor or good. Soil scientists describe soil types by how much sand, silt and clay is present. This is called texture. It is possible to change the texture by adding different things to the soil. You can roughly estimate the texture of a soil by a simple method called" manual texturing", through determining the feel of a moist sample when robbed between the thumb and forefinger. If the soil sample is predominantly sand, it will feel very gritty, If it is predominantly silt, it will feel smooth or slippery to the touch. And if it’s predominant clay, it will feel sticky.
Particle size has a lot to do with a soil’s drainage and nutrient holding capacity. Sand is the largest particle and doesn’t hold many nutrients. Silt is a soil particle whose size is between sand and clay. When wet, silt feels smooth, but not sticky. Clay is smooth when dry and sticky when wet. Soils high in clay content are called heavy soils. Clay also can hold a lot of nutrients, but doesn’t let air and water throuhgh it well. To better understand how big these three soil particles are, think of them like this. If a particle of sand were the size of a basketball, then silt would be the size of a baseball, and clay would be the size of golf ball. [br] According to the passage, which of the following has NOTHING to do with soil quality?
选项
A、Texture.
B、Width.
C、Depth.
D、Structure.
答案
B
解析
细节题。根据第一段提到的”Soil quality refers to the capacity of a soil to perform these beneficial functions and is determined by its texture, structure, water-holding capacity, porosity, organic matter content, and depth, among other properties."可见土质和土地的宽度并没有关系,故选B
转载请注明原文地址:https://tihaiku.com/zcyy/3198035.html
相关试题推荐
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Individualism,independence,andself-relianceareperhapsthemostdistin
Thereismuchmore______equalitybetweenparentsandchildrenthaninotherco
Soilqualityisoneofthemostbasicandperhapsleastunderstoodindicato
随机试题
Untilrecently,themedicalcommunitybelievedthatmosthearinglosswasca
Secondhandsmokeisaccountablefor42,000deathsannuallytononsmokersin
[originaltext]M:Right,Iguessyou’vegotsomeideasforourproductpromotio
热极津枯舌象是A.舌苔由润变燥 B.舌光无苔少津 C.舌苔由燥变润 D.舌
感冒治法有辛温解表和辛凉解表的不同,其理论依据是A、同病异治 B、异病同治
简单而常用的药材鉴定方法是A:基原鉴定B:性状鉴定C:显微鉴定D:理化鉴定
房地产经纪机构的风险管理的主要内容包括( )。A.风险评价 B.风险识别
既能降肺气,又宣散风热的药物是A.旋覆花 B.桔梗 C.白前 D.前胡
一般会计人员办理交接手续,由单位负责人监交。
下列属于功能性产业政策的是()。A.保护关税 B.改善营商环境 C.外资流
最新回复
(
0
)