Soil Resources - Part II Flashcards
Why is Red soil red in colour?
Due to the concentration of Iron Oxide
Ancient crystalline and metamorphic rocks of the ________ area break up to form red soil
Peninsular Plateau
_______ soil forms the second largest soil group of India
Red soil
Regions where red soil is found?
Maharashtra, Odisha, Jharkhand, Bundelkhand
pH value of red soil?
6.6 to 8.0
Characteristics of red soil?
- Red soil is red in colour due to the concentration of Iron Oxide
- It is porous and poor in nitrogen, phosphorous and potassium
- Contains soluble salts in small quantities
Crops of red soil?
P - Potato T- Tobacco G - Groundnut R - Rice R - Ragi
What is laterite soil?
Laterite soil is the soil formed as a result of atmospheric weathering of rocks
What is leaching?
The percolation of the nutrients of the of the soil due to heavy rainfall leaving the top soil infertile
Other name for leaching?
Desilication
The two types of laterite soils?
Upland laterite and Lowland laterite
What is Upland laterite soil?
The laterite soil which is formed over hills and uplands
What is Lowland laterite soil?
The soil transported from the highlands to the lowlands by the streams
What are the characteristics of Laterite soil?
- It is coarse in texture
- It is rich in iron oxide and is subjected to leaching
- Deficient in nitrogen
- Acidic in nature and is used for building purpose
Regions under laterite soil?
Madhya Pradesh, Odisha, Maharashtra, West Bengal, Andhra Pradesh, Karnataka and Tamil Nadu
Crops associated with laterite soils?
C - Coffe R - Rice R - Ragi R - Rubber S - Sugarcane T - Tea
What is Soil erosion?
The removal of the top soil cover by running water, wind and human activities is known as soil erosion
What are the types of soil erosion?
- Erosion by water:
i. Sheet erosion
ii. Rill erosion
iii. Gully erosion
iv. Leaching
v. Sea or Shore erosion
vi. Stream Bank Erosion - Erosion by Wind
3 things which lead to soil erosion?
Faulty agricultural practices, overgrazing, deforestation
3 things which help in the conservation of soil?
Improved agricultural practices, reduced pressure of overgrazing and afforestation
Alluvial soil is formed by the deposition of ……………………… as it flows from its upper to lower course
river load
Alluvial soil is formed by the deposition of river load as it flows from ………………………. to ………………………
upper to lower course
…………………………… is found upto a depth of 500m
Alluvial soil
Alluvial soil is found upto a depth of ……….. meters
500
Alluvial Soil is easily …………………
tillable
Maharashtra, Mtadhya Pradesh, Andhra Pradesh, Karnataka and Tamil Nadu are a part of ………………………..
Deccan lava tract
The ……………………….. of black soil makes it suitable for dry farming
moisture retentiveness
What is the pH value of red soil
6.6 to 8.0
Besides human activity, soils are degraded by nature during …………………. and …………………………..
droughts and floods
Sheet erosion occurs on ……………………………….. areas where ………………. is destroyed
gentle slope, vegetation
When sheet erosion occurs for long, the silt-laden run-off forms many ……………………………….. over a large area
finger-shaped rills or grooves
……………………………………. is the intermediate stage between sheet erosion and gully erosion
Rill erosion
………………….. erosion removes nutrients and heavy load of loose soil making the soil unproductive
gully
…………………. occurs when there is heavy downpour when the farmers leave the soil bare for some time after harvesting
leaching
…………………………… is the slow removal of thin layer of soil when vegetation is destroyed
sheet erosion
What type of water is involved in sea or shore eroision?
A) Underground water
B) Rainwater
C) Atmospheric water
D) Tidal water
option D is right
Where does sea or shore erosion occur?
Eastern and Western coasts of India
As a result of ……………………… large agricultural areas in the Uttar Pradesh and Madhya Pradesh and Rajasthan is getting transformed into ravines
Stream bank erosion
