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Test#3 SCSC301
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Preguntas del test (46)
1The structural size of a horizon having moderate, medium, columnar structure is ________ .
- Acolumnar
- Bmoderate, medium
- Cmoderate, medium columnar
- Dmedium
2________ is more soluble than the other minerals listed and thus is easily weathered from soils in humid regions.
- AGypsum
- BClay minerals
- CMica
- DHornblende
3_________g/cm3 is the most unlikely value for the bulk density of a soil.
- A1.2
- B1.4
- C1.6
- D2.3
4The soil component having the greatest heat capacity is ____________.
- Aair
- Bmineral matter
- Corganic matter
- Dwater
5_______ are the ultimate end products of weathering in soils.
- AQuartz minerals
- BClay minerals
- CFeldspars
- DOxides and hydroxides of Fe and Al
6Aggregate development primarily changes __________ volume in soils to improve them as media for plant growth.
- Alarge pore
- Bsmall pore
- Cboth large and small pore
- Dnone of the above
7What subsoil color indicates good drainage?
- Ablue
- Bgray
- Cgreen
- Dyellow
8Surface soil and ________ usually refer to the same layer within the soil.
- Aparent material
- BA horizon
- Csolum
- Dregolith
9Consistance of a moist soil may be described as _________________ .
- Afriable
- Bsoft
- Csticky
- Dhard
10In summer, daily fluctuations at 25cm depth differ from those at the soil surface by ___________.
- Ahaving a higher maximum temperature
- Bhaving a maximum later in the day
- Cshowing a maximum at less frequent intervals
- Dhaving a wider difference between maximum and minimum daily temperature.
11___________ describes the attraction between water molecules and solid surfaces.
- ACohesion
- BAdsorption
- CAdhesion
- DAbsorption
12Reactivity of materials in the weathering environment is a function primarily of ______________ .
- Aforce of gravity
- Bparticle size
- Cstructural type
- Delevation
13The air-filled porosity in soil having a bulk density of 1.2 g/cm3 and a particle density of 2.6 g/cm3, a total porosity of 0.54, a gravimetric water content of 0.25, and a dry mass of 100 g is __________.
- A0.29
- B0.54
- C0.25
- D0.24
14Soil as a medium for plant growth must provide all the following except ______ to plants.
- Anutrients
- Bwater
- Csilicon and aluminum
- Doxygen
15Soil structure influences soil aeration primarily through its effect on ______________ .
- Atotal porosity
- Bcapillary porosity (small pore)
- Cnon-capillary porosity (large pores)
- Dconsistence
16_____________ is a common primary silicate mineral that is resistant to weathering.
- AQuartz
- BClay minerals
- CHematite
- DFeldspar
17A completely unsorted transported parent material is ____________ .
- Aalluvium
- Blacustrine
- Cglacial till
- Dall of these
18When a soil has two or more colors present in a layer of soil, this would be an example of __________ .
- Aan infertile soil
- Ban old soil
- Ca well drained soi
- Da mottled soil
19A major role of oxygen in soils is in the ______________ processes of organisms.
- Aphotosynthetic
- B transpiration
- Crespiratory
- Dionic adsorption
20In the notations of a Munsell Color Book, a low value would be for a soil that is ____________ .
- Ahigh in calcite
- Bhigh in iron oxides
- Cstrongly gleyed
- Dhigh in organic matter
21All of the following except ____________are among the four plant essential metallic elements found in largest amounts in rocks and soils.
- Aaluminum
- Biron
- Cpotassium
- Dmagnesium
22Flocculation of colloids is largely dependent on ____________.
- Akinds of ions adsorbed
- Bhumus
- Cwetting and drying
- Dmicrobial gums
23Water is ____________ in soils.
- Aa medium for reactions
- Ba medium of ion transport
- Cessential for biotic life
- Da buffer against changes in temperature
- Eall of the above
24The matric potential of water retained in a soil after drainage is ______________ that of free water.
- Aless than
- Bgreater than
- Cthe same as
25A soil resulting from the weathering of a rock probably contains ________________ than the parent rock contains
- Aa higher percentage of silicon
- Ba lower percentage of bases
- Ca lower percentage of iron and aluminum
- Dnone of these
26A soil is found to have a bulk density of 1.35 g/cm3 and a particle density of 2.65 g/cm3. The soil solids would be ____________ .
- A0.491
- B0.423
- C0.611
- D0.509
27Soil is a dynamic natural body, having properties due to the combined effects of ___________ and biotic activity, as modified by relief, acting on parent material over time.
- Arainfall
- Btemperature
- Cweathering
- Dclimate
28Soil air tends to contain ___________ than atmospheric air.
- Aless oxygen
- Bless carbon dioxide
- C less water vapor
- Dless nitrogen
29_______________may weather to form silicate clay minerals in soils.
- AFeldspar
- BMica
- CQuartz
- DCalcite
- ETwo of the above (feldspar and mica)
30_______________is the principal mineral type in shale.
- ASilicate clay
- BCalcite
- CQuartz
- DFeldspar
31_____________is a term used in expressing the consistence of a moist soil.
- AFirm
- BSlick
- CGritty
- DMalleable
32Soil aeration occurs largely by the process of _____________ .
- Adiffusion
- Bmass flow
- Csuction
- Dtension
33_____________ is a passive factor of soil formation.
- AClimate
- BBiotic activity
- CWeathering
- DParent material
34If a mature soil has horizons of sandy clay loam (scl), loamy sand (ls) and sandy loam (sl), their order of occurrence in A, B, and C horizons, respectively, would be _________.
- Asl – ls – scl
- Bls – sl – scl
- Cls – scl – sl
- Dscl – sl – ls
35The management practices that affect soil temperature are those that affect _________________ .
- Asoil texture
- Bsoil consistence
- Csoil drainage
- Dcrop rotations
36Water moves from a B horizon containing small pores into a C horizon containing only large (non-capillary) pores ___________.
- Adue to a capillary potential gradient
- Bonly after the B horizon is saturated
- Cas soon as the wetting front reaches the C horizon
- Ddue to an osmotic potential gradient
37To determine the bulk density of soil using an undisturbed core, it is necessary to determine the ___________ of the core.
- Adry mass and bulk volume
- Bwet mass and bulk volume
- Cgravimetric water content, dry mass and bulk volume
- Ddry mass and particle volume
38_____________ is a mineral property that can be used to distinguish among mineral species in hand specimens.
- AMalleability
- BSize
- CCleavage
- DCost
39The soil property most influential in determining rate of gas movement at any point in time is _______________ .
- Agravimetric water content
- Btotal micropore space
- Cair-filled porosity
- Dtotal macropore space
40The major components of the typical moist surface soil are mineral matter, organic matter, water, and _____________ .
- Aoxygen
- Bhumus
- Cprimary minerals
- Dair
41Alluvium is ____________ .
- Awater transported and well sorted
- Bwater transported and poorly sorted
- Cwind transported and well sorted
- Dwind transported and poorly sorted
42Compaction of soils ________________ particle density and increases bulk density.
- Aincreases
- Bhas no effect on
- Cdecreases
43The weight per acre furrow slice for a soil with a bulk density of 1.20 g/cm3 when the acre furrow slice is considered to be 6 inches thick (water weighs 62.4 pounds per cubic foot and an acre has 43,560 square feet) is ____________ .
- A1,630,000 pounds
- B2,000,000 pounds
- C1,100,000 pounds
- D2,171,800 pounds
44Surface soils are ___________ than subsoils.
- Amore porous
- Bmore dense
- Cmore clayey
- Dhigher in color value
45Sand sized particles range in size from ____________ equivalent spherical diameter.
- A.005 - .02
- B.02 - 5mm
- C.002 - .05mm
- D.05 - 2.0 mm
46Warming of fine-textured soils in the Spring tends to be slow due to _______________ .
- Atheir high value
- Btheir low organic matter
- Ctheir granular structure
- Dtheir high moisture content
Información
- Descripción
- Test sobre Test#3 SCSC301, creado por Dylan Buysse el 09/06/2015.
- Autor
- Dylan Buysse
- Idioma
- English
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