TOPIC: CLASSIFICATION OF CROPS AND THEIR USES
BEHAVIOURAL OBJECTIVES: At the end of the lesson, pupils should be able to:
A chart showing all farm tools
Lagos state scheme of work,
Behavioral Objectives: pupils are familiar with the topic in their previous classes.� � � � � � � � � � � � � � � � � ��
Farmers plant many crops. Examples are maize, rice, tomato, pepper, okra, kola nut, beans and groundnut. We can classify all crops in various ways, mainly: according to forms and lifespan and according to types and uses.
The lifespan of a crop, however, is the average length of time that it will live. For example, some crops, such as yams, may live for one year. Others, such as the oil palm, may live for many years.�
Crops differ in their forms and lifespan. The form of a crop is the arrangement of its external parts (its parts that can be seen) in such a way that can be used to identify it. For example, a bean seedling has its parts arranged differently from a maize seedling.
There are two major forms of crop plants: monocotyledons and dicotyledons.�
Monocotyledons or monocotyledonous crops are crops that have one seed leaf buried in the soil after germination. An example is the maize seedling. The seed provides food for the plant when it starts to grow.
Monocots have only one seed leaf inside the seed coat. It is often only a thin leaf, because the endosperm to feed the new plant is not inside the seed leaf.�
Dicots have two seed leaves inside the seed coat. They are usually rounded and fat, because they contain the endosperm to feed the embryo plant.
Dicotyledons or dicotyledonous crops, on the other hand, are crops with more than one seed leaves carried above the soil after germination. An example is the bean seedling. The cotyledons supply the seedling with food after germination. They also protect the stem of the seedling when it first appears above the soil.
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