Types of fertilizer inorganic fertilizers and Methods of fertilizer for JSS 1

Class: JSS 1
Term: First Term
Week: 10
Age: 12 years
Duration: 45 minutes
Subject: Horticulture and Crop Production
Curriculum Theme: Horticulture and Crop Production
Focal competence: apply fertilizer
Key competencies/values: Critical Thinking; Respect
Skills:

• Identifying types of fertilizers
• Applying fertilizer using different methods

Previous Lesson: Meaning of fertilizer and Types of fertilizer organic fertilizers
Topic: Fertilizer Application: Types Of Fertilizer: Inorganic Fertilizers
Subject Matter: Types of fertilizer, Methods of fertilizer application

Specific Objectives

By the end of the lesson, pupils/students should be able to:

Cognitive Domain

• Identify the types of inorganic fertilizers.
• Outline the methods of fertilizer application, including ring application.
• Classify common nutrient-deficiency symptoms in plants.

Affective Domain

• Appreciate the importance of proper fertilizer application.
• Show respect for farm tools and materials during practical activities.

Psychomotor Domain

• Identify different types of fertilizers from samples.
• Apply fertilizer using various methods correctly.

Social Domain

• Collaborate effectively in groups to identify fertilizers.
• Work together to apply fertilizers using different methods.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Agricultural Science for Junior Secondary Schools, Book 1
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• Organic fertilizer (for comparison, if available)
• Inorganic fertilizer samples (e.g., Urea, NPK, SSP, MOP)
• Garden hoe
• Hand trowel
• Seedlings (e.g., maize, vegetable seedlings in pots or a small nursery bed)
• Video clips showing types of fertilizers and application methods

Rationale for the Lesson

This lesson is important for students to understand how to provide essential nutrients to plants for healthy growth and increased yield. Proper knowledge of fertilizer types and application methods helps prevent nutrient deficiencies and ensures efficient use of resources. This skill is fundamental for successful crop production in horticulture.

Prerequisite/Previous Knowledge

Students should have basic knowledge of plant nutrients and the importance of soil for plant growth.

Lesson Content/Board Summary

Fertilizer Application: Types Of Fertilizer: Inorganic Fertilizers and Methods of Fertilizer Application

Types of Inorganic Fertilizers

Inorganic fertilizers, also known as chemical or synthetic fertilizers, are manufactured from chemical compounds. They are concentrated and supply specific nutrients to plants. They are classified based on the major nutrient they provide:

1. Nitrogenous Fertilizers: These supply nitrogen (N), which is essential for vegetative growth (leaves and stems) and gives plants their green colour. Nitrogen deficiency leads to yellowing of leaves (chlorosis). Examples include Urea (46% N) and Ammonium Sulphate (21% N).
2. Phosphatic Fertilizers: These supply phosphorus (P), which promotes root development, flowering, fruiting, and seed formation. Phosphorus deficiency can cause stunted growth and purplish discolouration of leaves. Examples include Single Superphosphate (SSP) and Triple Superphosphate (TSP).
3. Potassic Fertilizers: These supply potassium (K), which helps in overall plant vigour, disease resistance, water regulation, and fruit quality. Potassium deficiency can lead to yellowing or browning of leaf margins (scorching) and weak stems. An example is Muriate of Potash (MOP) or Potassium Chloride.
4. Compound Fertilizers: These contain a combination of two or more primary nutrients (Nitrogen, Phosphorus, and Potassium) in varying proportions. They are often labelled as NPK fertilizers (e.g., NPK 15-15-15, NPK 20-10-10). They provide a balanced supply of nutrients.

Methods of Fertilizer Application

The choice of fertilizer application method depends on the type of crop, fertilizer, soil, and environmental conditions. Common methods include:

1. Broadcasting: This involves scattering the granular fertilizer evenly over the entire soil surface, either before planting or to an established crop. It is suitable for crops planted close together.
2. Side Dressing: Fertilizer is applied in a band along the side of the crop row, usually a few inches away from the plant stem to avoid direct contact and burning. This method is effective for row crops.
3. Ring Application: Fertilizer is applied in a circular band around individual plants, typically for trees, shrubs, or widely spaced crops. The fertilizer is dug into the soil slightly and covered.
4. Band Placement: Fertilizer is placed in bands on one or both sides of the seed row, either at planting time or shortly after. The bands are usually a few inches away from the seed and slightly below it.
5. Foliar Application: A diluted solution of liquid fertilizer is sprayed directly onto the leaves of plants. This method allows for quick absorption of nutrients, especially when plants show signs of deficiency, but it is a temporary measure.
6. Fertigation: This is the application of fertilizers through an irrigation system (e.g., drip irrigation). The fertilizer is dissolved in the irrigation water and delivered directly to the plant roots, ensuring efficient nutrient and water use.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Group Work, Practical Activity

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Questioning/Engaging

Teacher’s Activity: The teacher greets the students and asks questions about what plants need to grow well, linking to the idea of food for plants. The teacher then introduces the topic of fertilizers.

Pupils’ Activity: Students respond to questions and listen attentively to the introduction.

Learning Point: Plants need nutrients

Step 2: Explanation of Inorganic Fertilizers

Time: 8 minutes

Teaching Skill: Explanation/Classification

Teacher’s Activity: The teacher explains what inorganic fertilizers are, their concentrated nature, and how they provide specific nutrients. The teacher then introduces the main types: Nitrogenous, Phosphatic, Potassic, and Compound fertilizers, giving examples and linking them to specific nutrient deficiencies.

Pupils’ Activity: Students listen, ask questions, and take mental notes on the types and their functions.

Learning Point: Types of inorganic fertilizers

Step 3: Identification of Inorganic Fertilizers

Time: 7 minutes

Teaching Skill: Demonstration/Observation

Teacher’s Activity: The teacher displays samples of different inorganic fertilizers (e.g., Urea, NPK, SSP, MOP). In groups, students are guided to observe and identify the different types based on their appearance and the teacher’s explanation.

Pupils’ Activity: Students observe the fertilizer samples, discuss in groups, and identify the types.

Learning Point: Identifying fertilizer types

Step 4: Explanation of Fertilizer Application Methods

Time: 8 minutes

Teaching Skill: Explanation/Description

Teacher’s Activity: The teacher explains the various methods of fertilizer application: Broadcasting, Side dressing, Ring application, Band placement, Foliar application, and Fertigation. The teacher describes each method and its suitability.

Pupils’ Activity: Students listen, take notes, and ask clarifying questions about the methods.

Learning Point: Methods of fertilizer application

Step 5: Demonstration of Application Methods

Time: 5 minutes

Teaching Skill: Demonstration/Modelling

Teacher’s Activity: Using seedlings, a garden hoe, and a hand trowel, the teacher demonstrates one or two common application methods (e.g., ring application and side dressing) practically, emphasizing safety and correct distance from the plant.

Pupils’ Activity: Students observe the teacher’s demonstration carefully, noting the techniques and safety measures.

Learning Point: Correct application techniques

Step 6: Guided Practice on Application

Time: 4 minutes

Teaching Skill: Guided Practice/Supervision

Teacher’s Activity: The teacher divides students into groups and provides each group with a small amount of fertilizer, seedlings, and tools. The teacher guides the groups to practice applying fertilizer using different methods on their seedlings, ensuring correct and safe application.

Pupils’ Activity: Students work in groups to practice fertilizer application under the teacher’s guidance.

Learning Point: Practising fertilizer application

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. Mention two types of inorganic fertilizers.
2. Name three methods of fertilizer application.
3. Which fertilizer remedies nitrogen deficiency?
4. Demonstrate the ring application method.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Understanding fertilizer types and methods

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on types and methods of inorganic fertilizer application into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Recording lesson notes

Step 9: Conclusion

Time: 1 minute

Teaching Skill: Summarizing

Teacher’s Activity: The teacher briefly summarizes the importance of using the right type and method of fertilizer for healthy plant growth and thanks the students for their participation.

Pupils’ Activity: Students listen and prepare for the next lesson.

Learning Point: Lesson consolidation

Continuous Assessment/Further Study

Type: Homework

Instruction: Answer the following questions in your notebooks:

1. List and explain three types of inorganic fertilizers you learned today.
2. Describe any two methods of fertilizer application, stating when each is most suitable.
3. Research and write down one common symptom of potassium deficiency in plants.

Lesson Keywords

• Inorganic Fertilizers – Manufactured chemical compounds that supply specific plant nutrients.
• Nitrogenous Fertilizers – Fertilizers rich in nitrogen, promoting leaf and stem growth.
• Phosphatic Fertilizers – Fertilizers rich in phosphorus, promoting root, flower, and fruit development.
• Potassic Fertilizers – Fertilizers rich in potassium, enhancing plant vigour and disease resistance.
• Compound Fertilizers – Fertilizers containing a combination of two or more primary nutrients (N, P, K).
• Broadcasting – Scattering fertilizer evenly over the soil surface.
• Side Dressing – Applying fertilizer in a band along the side of a crop row.
• Ring Application – Applying fertilizer in a circle around individual plants.
• Foliar Application – Spraying liquid fertilizer directly onto plant leaves.
• Fertigation – Applying fertilizers through an irrigation system.

Differentiation

For slower learners, provide pre-labelled fertilizer samples and focus on identifying two types and two application methods. Pair them with faster learners during group activities. For faster learners, challenge them to identify more types of fertilizers or research additional application methods, and lead discussions on the advantages and disadvantages of each method.

Suggested Lesson Videos

For further understanding, search on YouTube for:

• “Types of inorganic fertilizers for JSS 1”
• “Methods of fertilizer application in agriculture”

Teacher Guide for Using This Lesson Plan

Before the lesson, gather various inorganic fertilizer samples (e.g., Urea, NPK, SSP, MOP) and ensure you have seedlings, a garden hoe, and a hand trowel for practical demonstrations. You may also prepare short video clips showing different fertilizers and application methods. Begin by engaging students with questions about plant growth to introduce the concept of plant nutrients and fertilizers. Proceed to explain the types of inorganic fertilizers, showing the samples and linking them to the nutrients they provide and the deficiencies they remedy. Guide students in groups to identify these samples. Next, explain and demonstrate the various application methods, emphasizing safety precautions like wearing gloves and avoiding direct contact with plant stems. Allow students to practice these methods in groups under close supervision. During note-taking, ensure students copy the Board Summary accurately. Pay attention to common misconceptions, such as applying too much fertilizer or placing it too close to the plant, and correct them immediately. Encourage active participation and critical thinking throughout the lesson, especially during the group activities.