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NABARD Agri 2025 > Soil Science 3 > Flashcards

Soil Science 3 Flashcards

1
Q

Gypsum nutralises which soil condition?

salinity, acidity, alkalinity, …

A

Soil Salinity

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2
Q

BD of Organic Matter and sandy soil is?

A

OM: 0.5 g/cc
Sandy: 1.6 g/cc

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3
Q

Density of solid particles collectively
aka True Density

A

Particle Density
It is 2.65g/cc for normal soil

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4
Q

Very fine or Very thin, Fine or thin, Medium, Coarse or thick, very coarse or very thick are used to classify?

A

Class of Soil Structure

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5
Q

Ability of soil to produce a particular crop or sequence of crops under a specified mgmt system: “Crop producing capacity of soil”

A

Soil Productivity

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6
Q

Ability of soil to supply essential nutrients to plants?

A

Soil Fertility

“All productive soils are fertile soils but all fertile soils are not productive soils”

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7
Q

Which State has the highest problematic soil?

A

Kerala
Also the highest acidic soil 24.26%

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8
Q

Which state has the highest saline soil?

A

Gujarat @ 15.59%

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9
Q

Fertiliser that is manufactured in Nangal
Prevents development of acidity in soil
Aka Kisan Khaad

A

CAN
Calc Ammonium Nitrate

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10
Q

Which of the following field crop can tolerate maximum acidity in soil?

A

Oats

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11
Q

Which crop is least salt tolerant?

A

Bengal Gram

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12
Q

Gabions are rectangular galvanised wire baskets used to control?

A

Stream Bank Erosion

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13
Q

Government of India, World Bank and State government of which states signed a USD 115 million MoU in 2022 for Rejuvenating Watersheds for Agriculture Resilience through innovative development programme to improve watershed management practices and increase farmers resilience to climate change

A

Karnataka & Odisha

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14
Q

What are the ways watersheds can be classified?

A

By size and by area

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15
Q

A watershed of size <250 km2 is called?

A

Small

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16
Q

A watershed of size 250-2500 km2 is called?

A

Medium

17
Q

A watershed of size >2500 km2 is called

A

Large

18
Q

What are the area based classification of watersheds?

A

10-100 ha, 100-1k ha, 1k-10k ha, 10k-50k ha, 50k-2L ha
Mini, Micro, Mili, Sub, Macro Watershed

19
Q

if watershed is 48000 ha in size, it can be called?

A

sub-water shed

20
Q

Downward movement of water through saturated or nearly saturated soil in response to gravity

A

Percolation

21
Q

Lateral seepage of water in relatively previous soil above a less pervious layer?

A

Interflow

22
Q

Which nutrient stimulates photosynthesis?

A

chlorine

23
Q

Formative and grand growth phase is critical for?

A

Sugarcane

24
Q

Deficiency of these minerals are seen in terminal buds and tips of leaves

A

Least mobile nutrients: Ca & Bo

25
Q

Deficiency of these minerals are seen in younger and older leaves, but not all

A

Moderately mobile minerals: Zn

26
Q

Soil that contains highly degraded OM, they have relatively higher pH values are also found in Kashmir, HP, Assam, and some other states. Identify the soil

A

Mucky Soil

27
Q

Elements which promote growth and may be essential for some plant species, but are not required by all plants.

A

Beneficial Nutrients

28
Q

Watershed Development Fund was built in NABARD, what is the broad objetive of the fund?

A

Unification of multiplicity of watershed development programmes

29
Q

Jiwi Daah Hasa, this high-impact mega watershed project aims to restore life, water and earth in X state’s most disadvantaged areas. The name comes from Adivasi languages Santhali and others and means ‘life’, ‘water’ and ‘earth’ respectively. X is?

A

Jharkhand

30
Q

A term used to describe both P-sorption and P-precipitation, which reduce phosphorus availability.

A

Phosphorus Fixation

31
Q

a soil with great P-fixation capacity has less available phosphorus after fertilisation than a soil with low ____ capacity?

A

P-fixation

32
Q

Which nutrient increases Phosphorus availability in the soil?

A

Sulphur & lime

33
Q

Which nutrient can decrease phosphorus availability in:
1. Acidic soil
2. Alkaline soil

A
  1. Fe & Al - for acidic soil
  2. Ca - for alkaline & Nitrogen
34
Q

Low analysis fertilizer contain less than what % of Primary nutrients?

A

25%

35
Q

The budget allocation for fertilizer aubsidy for 2024-25 is Rs. 1.64 L crore. This is a ____% decrease from the revised estimate of 2023-24

A

13.8%

Also a 5 year low

36
Q

A sapric organic soil that are saturated for > 30 cumulative days in normal years or are artificially drained. An example would be a soil made up of humus from drained swampland.

A

Mucky soil

37
Q

Soils with high ____ ratio are often used as mulch to control weeds in gardens and specialty crops

A

C:N

NABARD Agri 2025 (24 decks)

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