Lesson Notes By Weeks and Term - Senior Secondary School 1

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  4. Soil texture

Term: 2nd Term

Week: 6

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:    Agriculture

Topic:-       Soil texture       

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Explain the meaning of soil texture
  2. State the methods of soil texture determination
  3. Discuss the importance of soil texture

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher reviews the previous lesson on Soil formation

Students pay attention

STEP 2

EXPLANATION

She explains the meaning of soil texture

She states the methods of soil texture determination

Students pay attention and participates

STEP 3

DEMONSTRATION

She discusses the importance of soil texture

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

SOIL TEXTURE

Soil texture is the relative proportion of various particles of the soil. It also refers to the degree of fineness or coarseness of the various soil particles.

The particles which make up a soil sample include; gravel, sand, silt and clay are usually referred to as primary particles of the soil.

The name and sizes of the various soil particles are shown in the table below;

Name of Particles

Range of Particle diameter

Clay

Below 0.002mm

Silt

0.002 – 0.02mm

Fine Sand

0.02 – 0.2mm

Coarse Sand

0.2 – 2.0mm

Gravel

Above 2mm

 

METHODS OF SOIL TEXTURE DETERMINATION

  1. By feeling
  2. By mechanical analysis through sieving
  3. By sedimentation
  4. By moulding

 

IMPORTANCE OF SOIL TEXTURE

  1. It is useful in evaluation of the ability of soil to supply mineral nutrients.
  2. It supports soil microorganism essential for crop growth.
  3. It determines the type of crop to grow on the land.
  4. It enables the farmer to know the type of soil on his farm.
  5. It determines the movement of air and water in the soil

 

EVALUATION:   1. Explain the meaning of soil texture

  1. State the methods of soil texture determination
  2. Discuss the importance of soil texture

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively