Why we study the soil
The soil layers
· Read pages 4 to 12.
Is there a big hole in your village? If there is, look at it carefully. If there is not, dig one.
· Compare what you see with the drawings. Perhaps you don't see all the layers shown in the drawings.
· Take a good look at the part of the soil where the roots are.
What is soil made of?
Sand, clay and silt.
· Read pages 13 to 21.
· Do the experiment described on
Take a good look at it.
· Learn to see what the soils are like where you live.
Are they clay soils?
· Do carefully all the experiments shown.
Humus and the soil.
· Read pages 22 to 27.
· To help your memory reread pages 4 to 21.
· Look carefully at the drawing
on page 23.
It will help you to understand.
· Find out what crops make the soil poor in humus.
How is humus added to the soil?
Water and die soil.
· Read pages 28 to 36.
· Do the two experiments described on pages 30 and 32.
· Take a good look at the
drawing on page 31.
It shows you all the movements of water in the soil.
· Reread the whole booklet.
· Answer the question paper.
When you have understood fully, try to answer all the
Do not rush.
Make sure you understand before you write.