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close this bookBetter Farming Series 04 - The Soil: How the Soil is Made up (FAO - INADES, 1976, 37 p.)
View the document(introduction...)
View the documentPreface
View the documentPlan of work
View the documentWhy we study the soil
Open this folder and view contentsDifferent kinds of land
Open this folder and view contentsWhat is soil made of ?
View the documentAir in the soil
Open this folder and view contentsWater in the soil
Open this folder and view contentsLiving creatures in the soil
View the documentSuggested question paper

Plan of work


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 page 13.
Take a good look at it.

· Learn to see what the soils are like where you live.

Are they clay soils?
Or sandy?
Or silty?

· 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 questions.
Do not rush.
Make sure you understand before you write.