Better Farming Series 02 - The Plant: the Stem; the Buds; the Leaves (FAO - INADES, 1976, 30 p.): The leaves: What are leaves for?: (introduction...)

Better Farming Series 02 - The Plant: the Stem; the Buds; the Leaves (FAO - INADES, 1976, 30 p.)

(introduction...)

Preface

Plan of work

The stem

Where is the stem?

How a stem is made

What the stem does

The buds

The leaves

(introduction...)

How a leaf is made

(introduction...)

The leaf-stalk

The veins

The shape of leaves

What are leaves for?

(introduction...)

How the leaf changes raw sap into elaborated sap

Organic matter in the plant

The plant breathes.

The plant transpires.

Some practical applications

The plant needs air and light

The plant needs water

The plant needs its leaves

(introduction...)

To live, a man feeds and breathes.
To live, a plant also feeds and breathes.

THE PLANT FEEDS

· The plant takes up food from the soil through its roots. It takes water and mineral salts from the soil (see Booklet No. 1, page 17). But it has to change the water and mineral salts.
A baby drinks only milk. Its hair grows and so do its arms and legs.
It becomes strong and heavy.
The baby has changed the milk in its stomach into hair, fat, muscles, etc.

· The leaf changes the water and mineral salts taken from the soil by the roots. Water and mineral salts make up the raw sap (see Booklet No. 1, page 19, and Booklet No. 2, page 21 ).
The leaf changes the raw sap into elaborated sap.
The leaf sends the elaborated sap into the buds, flowers, fruits, stem and roots.

The elaborated sap feeds the whole plant.

· The leaf changes the raw sap into elaborated sap.

The elaborated sap FEEDS:

The elaborated sap feeds