Soil

Which is the most widespread soil type in India?
a) Alluvial soil
b) Black soil
c) Red soil
d) Laterite soil
✅ a) Alluvial soil

Black soil is also known as:
a) Khadar soil
b) Regur soil
c) Bangar soil
d) Podzol soil
✅ b) Regur soil

Which soil is best suited for cotton cultivation?
a) Red soil
b) Black soil
c) Laterite soil
d) Alluvial soil
✅ b) Black soil

The alluvial soil is mainly found in:
a) Deccan Plateau
b) Indo-Gangetic Plain
c) Coastal India
d) Western Ghats
✅ b) Indo-Gangetic Plain

Khadar refers to:
a) Old alluvium
b) New alluvium
c) Sandy soil
d) Red soil
✅ b) New alluvium

Bhangar refers to:
a) New alluvium
b) Older alluvium
c) Red soil
d) Saline soil
✅ b) Older alluvium

Which soil type is predominant in Bihar?
a) Black soil
b) Red soil
c) Alluvial soil
d) Desert soil
✅ c) Alluvial soil

Red soils are rich in:
a) Calcium carbonate
b) Iron oxide
c) Nitrogen
d) Phosphorus
✅ b) Iron oxide

Which state has the maximum area under black soil?
a) Gujarat
b) Madhya Pradesh
c) Maharashtra
d) Andhra Pradesh
✅ c) Maharashtra

Laterite soil is formed due to:
a) Glacial activity
b) Volcanic eruption
c) Intense leaching in heavy rainfall
d) Sedimentary deposition
✅ c) Intense leaching in heavy rainfall

Which soil is acidic in nature and poor in humus?
a) Black soil
b) Laterite soil
c) Red soil
d) Alluvial soil
✅ b) Laterite soil

Which soil is ideal for rice and jute?
a) Red soil
b) Alluvial soil
c) Laterite soil
d) Desert soil
✅ b) Alluvial soil

Which soil is most suitable for groundnut and pulses?
a) Black soil
b) Red soil
c) Alluvial soil
d) Desert soil
✅ b) Red soil

Desert soil is mainly found in:
a) Gujarat
b) Rajasthan
c) Madhya Pradesh
d) Odisha
✅ b) Rajasthan

Which of the following soils contains kankar nodules?
a) Red soil
b) Desert soil
c) Alluvial soil (Bhangar)
d) Black soil
✅ c) Alluvial soil (Bhangar)

Soil erosion is highest in:
a) Alluvial soil regions
b) Black soil regions
c) Red soil regions
d) Hilly regions with laterite soils
✅ d) Hilly regions with laterite soils

Which of the following soils cracks during summer?
a) Red soil
b) Laterite soil
c) Black soil
d) Alluvial soil
✅ c) Black soil

Peaty and marshy soils are found in:
a) Gujarat
b) Rajasthan
c) Kerala and West Bengal
d) Bihar
✅ c) Kerala and West Bengal

Which soil is saline in nature?
a) Peaty soil
b) Desert soil
c) Red soil
d) Laterite soil
✅ b) Desert soil

In Bihar, red and yellow soils are mostly found in:
a) North Bihar
b) South Bihar (Chotanagpur fringe)
c) Western Bihar
d) Central Bihar
✅ b) South Bihar (Chotanagpur fringe)

What is the ideal soil pH for most crops?
a) 3–4
b) 5.5–6.5
c) 6.5–7.5
d) 8–9
✅ c) 6.5–7.5

Soil conservation method used on hill slopes:
a) Strip cropping
b) Mulching
c) Terracing
d) Contour bunding
✅ c) Terracing

Which soil type supports cashew cultivation?
a) Red soil
b) Desert soil
c) Alluvial soil
d) Peaty soil
✅ a) Red soil

What is the parent rock of red soil?
a) Granite
b) Basalt
c) Limestone
d) Shale
✅ a) Granite

Which is the most fertile soil among all types?
a) Red soil
b) Alluvial soil
c) Laterite soil
d) Desert soil
✅ b) Alluvial soil

Red and yellow soils are common in:
a) Indo-Gangetic plains
b) Deccan Plateau
c) Himalayan region
d) Coastal areas
✅ b) Deccan Plateau

Which type of soil has the highest water retention capacity?
a) Sandy soil
b) Red soil
c) Black soil
d) Laterite soil
✅ c) Black soil

Alluvial soils are mainly classified into:
a) Two types
b) Three types
c) Four types
d) One type
✅ a) Two types (Khadar and Bhangar)

Black soil develops cracks due to:
a) High temperature
b) Over-irrigation
c) Clay content
d) Organic matter
✅ c) Clay content

What color is laterite soil?
a) Black
b) Yellow
c) Red-brown
d) Gray
✅ c) Red-brown

Which soil is poor in nitrogen and phosphorus but rich in potash?
a) Red soil
b) Desert soil
c) Alluvial soil
d) Black soil
✅ d) Black soil

Which region in India has the maximum laterite soil?
a) Gujarat
b) Western Ghats
c) Indo-Gangetic plain
d) Rajasthan
✅ b) Western Ghats

Which soil type requires frequent manuring?
a) Red soil
b) Black soil
c) Alluvial soil
d) Peaty soil
✅ a) Red soil

Which of the following helps improve soil fertility?
a) Excess irrigation
b) Use of chemicals
c) Crop rotation
d) Shifting cultivation
✅ c) Crop rotation

Which is the youngest soil in India?
a) Laterite soil
b) Alluvial soil
c) Black soil
d) Red soil
✅ b) Alluvial soil

Red soil appears red due to the presence of:
a) Iron
b) Manganese
c) Silica
d) Aluminum
✅ a) Iron

Soil fertility decreases due to:
a) Crop rotation
b) Use of organic manure
c) Monocropping
d) Green manuring
✅ c) Monocropping

Peaty soils are generally:
a) Highly alkaline
b) Highly acidic
c) Neutral
d) Saline
✅ b) Highly acidic

Black soils are mainly found in which river basin?
a) Ganga
b) Narmada
c) Kosi
d) Teesta
✅ b) Narmada

Soil degradation due to excess irrigation leads to:
a) Waterlogging
b) Salinity
c) Alkalinity
d) All of the above
✅ d) All of the above

Which soil supports ragi and millet crops?
a) Alluvial soil
b) Desert soil
c) Red soil
d) Black soil
✅ c) Red soil

What is the main component in desert soil?
a) Clay
b) Silt
c) Sand
d) Humus
✅ c) Sand

Soil horizon 'A' mainly contains:
a) Parent rock
b) Minerals only
c) Organic matter and minerals
d) Weathered bedrock
✅ c) Organic matter and minerals

Which soil is found near river valleys?
a) Laterite soil
b) Desert soil
c) Alluvial soil
d) Red soil
✅ c) Alluvial soil

Which soil type is used for brick-making in Bihar?
a) Red soil
b) Alluvial soil
c) Peaty soil
d) Black soil
✅ b) Alluvial soil

Which region in Bihar is suitable for sugarcane due to fertile alluvium?
a) Mithilanchal
b) Magadh
c) Tirhut
d) Bhojpur
✅ c) Tirhut

Red soil is deficient in which nutrients?
a) Nitrogen and phosphorus
b) Calcium and potassium
c) Zinc and copper
d) Manganese and iron
✅ a) Nitrogen and phosphorus

Soil with high humus content is generally:
a) Peaty soil
b) Red soil
c) Desert soil
d) Alluvial soil
✅ a) Peaty soil

Desert soil is deficient in:
a) Salt
b) Organic matter
c) Potash
d) Phosphates
✅ b) Organic matter

Which soil is ideal for paddy cultivation in Bihar?
a) Red soil
b) Laterite soil
c) Black soil
d) Alluvial soil
✅ d) Alluvial soil