Soil Profile, Properties and types are described here You can easily understand this. Thank you!! Ram Charan Follow, Like & Share

1. SOIL PROFILE, TYPES OF SOIL &
PROPERTIES OF SOIL
CH 9 SOIL

2. SOIL PROFILE
 A Vertical section through which
different layers of soil are seen is called
soil profile.
 The layers of the soil are different in
colour,depth, texture and chemical
composition. These layers are called
A – HORIZON
 This Horizon Is also known as Top soil.
usually dark in colour. This layer is rich
 The roots of plants are entirely
SOIL PROFILE

3. SOIL PROFILE
B – HORIZON
 This layer have more amount of minerals than humus
 This layer is more compact and harder than Top Soil
C - HORIZON
 This layer is made of Lumps of rocks
 Plants cannot utilize this layer
R – HORIZON
 This layer is known as bedrock
 This layer is full of rocks
 The rocks undergo weathering

4. TYPES OF
SOIL
 The soil is classified on the basis of
number of particles
 Types of Soils :
Sandy Soil
Clayey Soil
Loamy Soil

5. TYPES OF SOIL
LOAMYSOIL
• It isa mixtureof SandyandClayeysoil
• It hasequalamountof finerandlargerparticles
• It isbestforgrowingplants
• It canholdwater
SANDY SOIL
• It has more amount of large particles
than fine particles
• It has large spaces between
• It cannot holdwater
CLAYEYSOIL
• It hasmore amount of Fine
particlesthanlargerparticles
• Tinygaps are therebetween
• This soilcan holdwater

6. PERCOLATION RATE OF SOIL
 The rate at which water exits from soil is called percolation rate
PERCOLATION RATE =
Amount of Water Percolated(mL)
Time Taken to Percolate(min)
Percolation rate is highest
in Sandy Soil
Lowest in Clayey Soil

7. ABSORBTION OF WATER BY SOIL
 Amount of water absorbed by soilis absorption
ABSORPTION = (U-V)g

8. Questions
1. In which layer do Bacterial & Fungi Live?
2. In which type of Soil Percolation Rate is neither high nor low?
3. Which type of soil is best for growing Crops?
4. Which Soil is best for growing Rice & Wheat?
5. Which Variable is Sandy Soil?
Answer 3,4&5 from the following table
X Soil 20 ml/min
Y Soil 50 ml/min
Z Soil 30 ml/min

9. ANSWERS
1. TOP SOIL/A HORIZON
Because HUMUS & DEAD MATTER is mostly present on this
layer so, the bacteria grows here.
2. LOAMY SOIL
We know that it has equal amount of Greater&Finer particles