NOUN TMA Questions and Answers: BIO408- Soil Ecology

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Richtubor
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NOUN TMA Questions and Answers: BIO408- Soil Ecology

Postby Richtubor » Thu Feb 07, 2019 7:24 am

NOUN TMA Questions and Answers: BIO408- Soil Ecology


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Q1 ____ is defined as the mass per unit volume of soil solides

Soil particle density

Q2 _____ describes the manner in which soil particles are aggregated

Soil structure

Q3 _____ are major factors have the greatest influence on the colour of soil except

organic matter content
water content
presence and oxidation states of iron and manageress oxides
---none of the option

Q4 A standard system for accurate colour description has been developed using __

munseu colou r charts

Q5 ____have little effects on the behaviour and use of soils

Soil colours

Q6 Soils display a wide range of colours like

red
yell ow
green
---All of the option

Q7 are basis soil physical properties except

texture
colour
pore si zes
---none of th e option

Q8 Water is crucial to ___.

life

Q9 the capacity of ____ to store available water determines to a great extent their sefulness for plant growth.

soils

Q10 The least limiting water range concept tells us that soils are too dry for normal

root growth

Q11 Soil compaction generally reduces the amount of ____ that plants can take up

Water

Q12 The only way to determine whether a soil is acidic, neutral or alkaline is by carrying out a

Plant analysis

Q13 _____have provided a means for monitoring waste products on farm lands in order to ensure maximum crop performance

Plant analysis

Q14 _____ is very effective in documenting response to nutrient applications

Plant analysis

Q15 The nitrate content of mature _____ is measured at the end of the season

plant stalk

Q16 ____ consists of sampling of the tissues, analysing them for their chemical constituents and interpreting the results.

Tissue Analys is

Q17 Nutrient concentration of essential elements in plant is related to plant growth or _____.

crop yield

Q18 One of the basic tools of available for diagnosing soil fertility problems is ___

plant tissue analysis

Q19 The continuous availability of plant _____ is critical for the sustainability of most ecosystems.

nutrients

Q20 _____ is an invaluable tool in making fertiliser recommendations

Soil testing



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Richtubor
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Re: NOUN TMA Questions and Answers: BIO408- Soil Ecology

Postby Richtubor » Thu Feb 07, 2019 7:26 am

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Q21 The soil test values are indices of

nutrient

Q22 The standard depth of sampling for a plowed soil is the depth of the plowed

Layer

Q23 Soil analysis involves _____ phases

3

Q24 ______ weathering is encouraged by the presence of water

mechanic al

Q25 _______ sometimes enter cracks in rocks and pry them apart, resulting in some disintegration.

Plant roots

Q26 _______ changes set up differential stresses that eventually cause the rock to crack.

temperature

Q27 ___ a biochemical process that involves both destruction and synthesis

Weather ing

Q28 ___ are commonly classified as igneous, sedimentary and metamorphic

Rocks

Q29 Oxisols are found on about _% of the world􀳦??s land,

8

Q30 _____ are formed by the accumulation of calcium-rich organic matter

Mollisols

Q31 _____ develop from limestone,

Vertisols

Q32 Histosols cover only about _% of the world􀳦??s land areas in cold

1

Q33 In ______ the beginning or inception of profile development is evident

inceptiso ls

Q34 The following are soil orders except

Entisols
Gelisols
Aridisol s
---None of t he option

Q35 Globally, entisols occupy about __% of the total ice free land area

16

Q36 The soil moisture level is sufficiently high to support plant growth for no longer than __ consecutive days .

90

Q37 ____ are usually formed on volcanic ash deposited in recent geological times

Andisol s

Q38 _____ are formed in cool to hot humid areas

Alfisols

Q39 The nomenclature system is ______ and conveys a great deal of information about the nature of soils.

Logical

Q40 There are ___ categories of classification in soil taxonomy

6



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Richtubor
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Re: NOUN TMA Questions and Answers: BIO408- Soil Ecology

Postby Richtubor » Thu Feb 07, 2019 7:28 am

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Q41 Soil is saturated with water and virtually free of gaseous oxygen

Aquic

Q42 The kandic horizon has an accumulation of __ and ___ oxides as well as low activity silicate clays.

Fe, A l

Q43 histicepipedon derived from

Greek histos, tissue

Q44 melanicepipedon derived from

Greek melas, black

Q45 mollicepipedon derived from

Latin mollis, soft

Q46 Soil classification system, called

soil taxonomy

Q47 _____ Materials are lost from the soil profile from outside source are considered additions

Losses

Q48 Inputs of materials to the developing soil profiled from outside sources are considered

Additions

Q49 ____involve of movement of in organic and organic materials laterally within a horizon or vertically from one horizon up or down to another

Translocations

Q50 This occurs when soil constitutions are chemically or physically modified or destroyed

Transformations

Q51 Chemical weathering is governed by __ basic types of reactions

6

Q52 Soil is a collection of individual ___

Soils

Q53 in certain situations one of the factors could have had dominant influence in determining the difference among a set of soils, by the topography is ___

toposequenc e

Q54 in certain situations one of the factors could have had dominant influence in determining the difference among a set of soils, by the Biota is ___

biosequence

Q55 in certain situations one of the factors could have had dominant influence in determining the difference among a set of soils, by the Climate is ___

Climosequence

Q56 in certain situations one of the factors could have had dominant influence in determining the difference among a set of soils, by the time is ___

chronoseque nce

Q57 in certain situations one of the factors could have had dominant influence in determining the difference among a set of soils, by the parent material is ___

lithosequence

Q58 _____ are the major factors that control the formations of soils that have been recognised

climate
biota
---All o f the option
Time

Q59 Sources of organic materials include

crop residues
animal manur e
compost
---All of th e option

Q60 how soil particles are aggregated is

soil structure



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Richtubor
Posts: 502
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Contact:

Re: NOUN TMA Questions and Answers: BIO408- Soil Ecology

Postby Richtubor » Thu Feb 07, 2019 7:29 am

Email: Solutions2tma@gmail.com
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Q61 determined by size of mineral and organic matter particles

Soil texture

Q62 Some nutrients become less bioavailable when another nutrient is in

excess

Q63 Geo means

Rocks, air and water

Q64 Bio means

Living orga nisms

Q65 The movement of nutrient elements through the various components of an ecosystem is called

nutrient cyclin g

Q66 present in the soil at any given time, is referred to as the

standing state

Q67 In biogeochemical cycles, nutrient elements usually enter the living system through ____

vegetation

Q68 There are two basic types of biochemical cycles. These are: gaseous cycles and ___

Sedimentary

Q69 Most phosphorus is stored in abiotic ____

Rocks

Q70 All organisms need abiotic phosphorus to make biotic phosphates for ____ and other cell molecules.

DNA

Q71 s a component of proteins, enzymes and other compounds.

Sulfur

Q72 In the carbon cycle the primary photosynthesisers is

phyto plankton

Q73 Plants do release carbon dioxide from their leaves and ____

Roots

Q74 Carbon dioxide is also released by the combustion of organic carbon sources such as wood, coal and

Oil

Q75 _____ is the cycling of the earth􀳦??s limited amount of nitrogen

Nitrogen cyc le

Q76 Nitrogen mineralisation also known as

Ammonification

Q77 Nitrification occurs when _______ oxidize ammonia or ammonium ions

Bacteria

Q78 Soil chemical properties control the availability of nutrients to

Plants

Q79 The importance of each of the pool varies greatly between

Element

Q80 The following are the primary pools or reservoirs of nutrients in a soil exept

Soil solution
organic matte r
primary and se condary minerals
---none of the option



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