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close this bookBetter Farming Series 02 - The Plant: the Stem; the Buds; the Leaves (FAO - INADES, 1976, 30 p.)
View the document(introduction...)
View the documentPreface
View the documentPlan of work
close this folderThe stem
View the documentWhere is the stem?
View the documentHow a stem is made
View the documentWhat the stem does
View the documentThe buds
close this folderThe leaves
View the document(introduction...)
close this folderHow a leaf is made
View the document(introduction...)
View the documentThe leaf-stalk
View the documentThe veins
View the documentThe shape of leaves
close this folderWhat are leaves for?
View the document(introduction...)
View the documentHow the leaf changes raw sap into elaborated sap
View the documentOrganic matter in the plant
View the documentThe plant breathes.
View the documentThe plant transpires.
close this folderSome practical applications
View the documentThe plant needs air and light
View the documentThe plant needs water
View the documentThe plant needs its leaves

The shape of leaves

The leaves of yam are not like those of cassava.
You can recognize a plant by looking at the leaves.

Leaves are simple or compound.

· Simple leaf

The simple leaf can be entire or lobed.

Entire simple leaf
Examples: yam , millet, okra., hibiscus, maize, cocoa, teak, coffee

Lobed simple leaf
Examples: cassava, cotton

· Compound leaf

Look carefully at the drawing of a groundnut leaf. What it shows is not four groundnut leaves. It is a single leaf.
But this leaf is made up of a midrib bearing four little leaves.
These little leaves are called leaflets.
The midrib of a compound leaf is not a stem.
So there is never a bud between the midrib and the leaflets.

A groundnut leaf