Lesson Notes By Weeks and Term - Senior Secondary School 1

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  4. Soil temperature and soil pH

Term: 2nd Term

Week: 7

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:    Agriculture

Topic:-       Soil temperature and soil ph

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

  1. Explain the meaning of soil temperature
  2. State the importance of soil temperature to crop growth
  3. Explain soil ph and how it affects crop growth

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 texture

Students pay attention

STEP 2

EXPLANATION

She explains the meaning of soil temperature

She states the importance of soil temperature to crop growth

Students pay attention and participates

STEP 3

DEMONSTRATION

She discusses the meaning of soil ph and how it affects crop growth

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 TEMPERATURE

Soil temperature refers to the hotness or coldness within the soil.

 

IMPORTANCE OF SOIL TEMPERATURE TO CROP GROWTH

  • It determines the rate of formation and decomposition of organic matter.
  • High temperature will impede the activities of micro-organisms.
  • Optimum temperature promoted seed germination.
  • It determines the population of soil microbes.
  • It determines maturity and ripening of fruits.

 

SOIL PH

Soil ph is the measure of the degree of acidity or alkalinity of the soil. It can also be defined as the measure of the concentration of hydrogen ions (H+) in the soil. A PH scale is use to determine soil acidity as shown below.

Note that;

  • PH2 is strongly acidic
  • PH6 is slightly acidic
  • PH7 is neutral
  • PH8 is slightly alkaline
  • PH13 is strongly alkaline

 

EVALUATION:   1. Explain the meaning of soil temperature

  1. State the importance of soil temperature to crop growth
  2. Explain soil ph and how it affects crop growth CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively