NOUN TMA Questions and Answers: BIO408- Soil Ecology Contd

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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
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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
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Q29 Oxisols are found on about _% of the worldō€³¦??s land,

8

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

Mollisols

Q31 _____ develop from limestone,
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Vertisols

Q32 Histosols cover only about _% of the worldō€³¦??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
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---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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