Soil

What are the mineral particles present in the soil ?

• Silt

• Copper

• Gravel

• Dirt

Which is not a distinct layer of soil ?

• Clay

• Plants

• Sand

• Humus

Which soil retains the most water ?

• Sand

• Loam

• Clay

• Top Soil

What equation do we use to find the percolation rate of the soil ?

• Rate of Percolation = Amount of water / Percolation of water

• Rate of Percolation = Amount of nutrients / Percolation of oxygen

• Rate of Percolation = Amount of water / Percolation Time

When we do the activity of finding the absorption rate of soil . What does U,V and A stand for ?

The Property : ( U - V ) ÷ A x 100

• Initial volume of humus , Final volume of soil and Weight of dust

• Initial volume of water , Final volume of water and Weight of soil

• Final volume of soil , Initial volume of water and Weight of dirt

How many Horizons are there in the soil profile ?

• 4

• 3

Which two soils are used for growing cotton ?

(a)  

Which soil is used for growing Paddy ?

(a)  

Which soil is used for growing lentils and pulses ? Why ?

• Clayey Soil , Because it has a good capacity to retain water .

• Sandy Soil , Because it has air spaces between them to trap the oxygen .

• Loamy Soil , Because it drains water easily .

Percolation rate of water is different in different types of soil . It is the Highest in _________ and the Lowest In ____________ .

(a)