Soil Resources Flashcards
Residual soil?
Soils formed in their original position by breaking up of their parent material
Transported soil?
Soils transported by various agents of erosion
Another name for Residual Soil?
in situ soil
Another name for Transported soil?
ex situ soil
What is alluvial soil?
The soil formed by the sediments transported by rivers
The fine particles deposited by rivers?
Alluvium
What is alluvial soil also called? Why?
Riverine soil. This is because it is mostly found near the river basins
What is the composition of alluvial soil?
Mixture of sand, clay and silt called loam
What is the mixture of sand, clay and silt called?
Loam
Three Important river systems that deposit alluvial soil
Indus, Ganga and Brahmaputra
What percent of the land area does alluvial soil cover?
40%
Which area in India is fully made up with alluvial soil?
Northern Plains
In deltas of which rivers is alluvial soil predominant?
Mahanadi, Godavari, Krishna and Kaveri
What are the two types of alluvial soil on the basis of age?
Khadar and Bhangar
Which alluvial soil contains lime nodules or kanker?
Bhangar or older alluvial soil
Which soil is more fertile among Khadar and Bhangar
Khadar soil
Alluvial Soil forms the largest and most important group as it contributes to the __________ of India
agricultural wealth
__________ forms the largest and most important group as it contributes to the agricultural wealth of India
Alluvial Soil
Characteristics of Alluvial Soil?
- It is dry, porous, sandy, and yellow in colour
- It is rich in lime, iron, magnesia, potassium alumina
- Deficient in Nitrogen
- Contains clay
In drier areas, alluvial soil is more _______
alkaline
Crops associated with alluvial soil
Rice wheat sugarcane cotton oilseed gram tobacco RWSCOGT
Alluvial soil is good for the growth of ________ and __________ crops
Kharif and Rabi crop
In which region is alluvial soil useful for jute cultivation?
Lower Ganga-Brahmaputra valley
What is black soil also called?
Black-cotton soil, regur soil or lava soil
What type of soil is Black soil?
residual soil
Where is black soil found?
Maharashtra, Madhya Pradesh, Gujarat, Andhra Pradesh, Karnataka and some parts of Tamil Nadu
What is the percentage of clay content in black soil?
50%
What happens to lava soil when wet and dry?
When wet, it expands. When dry, it shrinks and develops big cracks
What are the minerals Alluvial soil is rich in?
L- lime I- iron M- magnesia P- potash A- alumina
What are the minerals Black soil is rich in??
L - Lime I - Iron M - Magnesium P - Potassium C - Calcium
Minerals Black soil is poor in?
Poor in Phosphorous, nitrogen and organic matter
Characteristics of Black Soil?
- Fine textured and clayey in nature
- Rich in Lime, Iron, Magnesium, Calcium and Potassium
- Poor in Nitrogen and Phosphorous due to it’s clayey nature
- It is black in colour as it is a product of lava
- It develops cracks when dry and gets sticky when wet
