Back to Course

SS2: BIOLOGY - 1ST TERM

0% Complete
0/0 Steps
  1. Classification of Plants | Week 1
    3 Topics
    |
    2 Quizzes
  2. Digestive System I | Week 2
    4 Topics
    |
    1 Quiz
  3. Digestive System II | Week 3
    4 Topics
    |
    1 Quiz
  4. Transport System I | Week 4
    5 Topics
    |
    1 Quiz
  5. Transport System II | Week 5
    3 Topics
  6. Transport System III | Week 6
    1 Topic
  7. Mechanism of Transportation in Higher Animals | Week 7
    3 Topics
    |
    1 Quiz
  8. Transport in Plants | Week 8
    2 Topics
  9. Experiment to Demonstrate the Flow of Materials in Plants | Week 9
    2 Topics
    |
    1 Quiz
  10. Respiratory System | Week 10
    2 Topics



Lesson Progress
0% Complete

Topic Content:

  • Agricultural Classification of Plants

This method of classification is based on the economic importance of the plant and the products obtained from them.

Plants are therefore classified as follows:

1. Cereals:

These are grain crops. They are rich in carbohydrates and fibres and belong to the family Gramineae. Examples are rice, millet, wheat, oats, barley, sorghum, etc.

2. Legumes:

They are cultivated for their fruits and seeds. They serve as food for man and as fodder crops for animals. They are rich in protein. In addition, legumes replenish soil nitrogen because nodules on their roots contain nitrogen-fixing bacteria which makes them important in crop rotation.

Examples are cowpeas, groundnuts, soya beans, pigeon peas, etc.

3. Root Crops:

They store food, mainly starch in underground organs. They are cultivated for food and animal feed. Examples of root and tuber crops are yam, cassava, and beet.

4. Vegetable Crops:

These are herbaceous plants whose vegetative parts are consumed as food. They are rich in vitamins and minerals. Examples are leafy vegetables such as cabbage, spinach, and lettuce and fruit-bearing vegetables such as okra, tomato, pepper, etc.

5. Fruits:

Fruit crops are crops whose fruits and seeds are eaten. They are rich in vitamins and minerals. Examples include mango, orange, avocado pear, banana, plantain, pawpaw etc.

6. Beverages and Drugs:

These are plants whose vegetative parts serve as raw materials for stimulants and beverages. Some of the important beverage crops are cocoa, tea, coffee, kola nut, sugarcane, coconut, lemon, quinine, grapefruit, tobacco and sweet lime. Tobacco is a stimulant and quinine is used as a medicine.

7. Oil Crops:

These are plants whose seeds or fruits produce oil. In other words, oil can be extracted from the fruits or seeds of these plants e.g. groundnut, soybean (also known as soya bean), seed of cotton plant, coconut, sunflower, shea butter, castor oil plant, etc.

8. Spices:

These are crops whose parts are used to season or add flavour to our food e.g. pepper, ginger, onion, cinnamon, cloves, curry leaves.

9. Latex:

These crops (trunks of certain trees) produce a milky fluid known as latex, which is used for the production of plastics. The rubber tree is used to make natural rubber and is grown in tropical countries.

latex tree
Rubber tree.

10. Fibre Plants:

These plants are cultivated for their fibres. Which is used for making ropes, and bags e.g. cotton, jute, hemp, flax, rama and sisal.

avataravatar

Responses

Your email address will not be published. Required fields are marked *

error: Alert: Content selection is disabled!!