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nabard agri > Soil Science 2 > Flashcards

Soil Science 2 Flashcards

1
Q

What does Soil Erosion involve?

A

Detachment -> Transportation -> Deposition

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2
Q

Soil erosion word comes from?

A

Latin Word:
erodere -> eating away

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3
Q

RULSE is used by researchers for?

A

Pan-India soil erosion estimate

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4
Q

What are the factors considered in RULSE?

A

4 parameters:
1. Predicted crop loss
2. Rainfall
3. Soil erodibility
4. Land management practices

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5
Q

Full form of RULSE?

A

Revised Universal Soil Loss Equation

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6
Q

According to RULSE, what % of india is experiencing minor soil erosion

A

30%

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7
Q

According to RULSE, what % of india is experiencing catastrophic topsoil loss

A

3%

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8
Q

According to RULSE, what is the country’s biggest hotspot for soil erosion

A

Brahmaputra Valley

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9
Q

According to RULSE which state is a hotspot for catastrophic erosion due to anthropogenic interventions

A

Odisha

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10
Q

What is defined as catastrophic erosion?

A

over 100 tonnes of soil lost per ha

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11
Q

What are the 3 main types of soil loss?

A

Geological
Wind
Water
Gravity (Colluvium)

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12
Q

Saltation, Suspension & Creep is associated with which type of erosion?

A

Soil Erosion

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13
Q

What are the different forms of water erosion?

A

HAAS
Hydraulic, Abrasion,
Attrition, Solution

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14
Q

What are the different types of water erosion?

A

SSS-RGC
Splash, Sheet, Rill, Gully,
Coastal, Stream Bank

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15
Q

Headquaters of National Bureau of Soil Survey and Land Use Planning

A

Nagpur

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16
Q

A mathematical model used to predict the long term average annual rate of soil erosion

A

Universal Soil Loss Equation

17
Q

Who introduced Universal Soil Loss Equation (ULSE)?

A

W. H. Wischmeier

18
Q

What is the USLE?

A

A = R x K x LS x C x P
A = Predicted Soil Loss, R = Rainfall & Runoff, K = Soil Erodibility, LS = Slope Length & Steepness, C = Crop Management, P = Support Practices (farming direction, strip cropping)

nabard agri (9 decks)

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