Soil Conservation in the Sahel (Leaving Cert Geography): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is run-off in the context of Sahel soil erosion?
What is run-off in the context of Sahel soil erosion?
Rainfall washing away topsoil & nutrients
How far apart are stone lines typically spaced on sloping land?
How far apart are stone lines typically spaced on sloping land?
Between 10 and 25 metres apart
Despite occupying how much ground space, stone lines can increase crop yields by over 50%?
Despite occupying how much ground space, stone lines can increase crop yields by over 50%?
Less than 2%
Why are stone lines considered a successful low-technology solution for Sahel farmers?
Why are stone lines considered a successful low-technology solution for Sahel farmers?
Materials are freely available locally
During which months are Zai holes typically dug in the Sahel?
During which months are Zai holes typically dug in the Sahel?
November to May
What are the typical dimensions of Zai holes?
What are the typical dimensions of Zai holes?
20-40 cm diameter, 10-20 cm deep
How many Zai holes might farmers create per hectare?
How many Zai holes might farmers create per hectare?
12,000 to 25,000
How do termites help improve Zai holes?
How do termites help improve Zai holes?
They break down organic matter into humus
What is contour ploughing?
What is contour ploughing?
Ploughing across slopes along contours
What problem does traditional up-and-down ploughing create?
What problem does traditional up-and-down ploughing create?
Channels allow rapid water flow downslope
Why is terracing not particularly well-suited to much of the Sahel?
Why is terracing not particularly well-suited to much of the Sahel?
The terrain is mainly flat
What is the key principle behind all Sahel soil conservation techniques?
What is the key principle behind all Sahel soil conservation techniques?
Slowing water to let it soak in