Browse through topics for Senior Secondary 2 1st, 2nd and 3rd Terms, All Weeks, All Subjects

**Term: 1 ^{st} Term**

**Week: 7**

**Class: Senior Secondary School 2**

**Age: 16 years**

**Duration: 40 minutes of 2 periods each **

**Date: **

**Subject: Agriculture**

**Topic:- Calculations on area of farmland**

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

**State the formulas for calculating the area of a farmland****Carry out some calculations**

**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 farmstead |
Students pay attention |

STEP 2 EXPLANATION |
She states the formula for finding the area of farmland |
Students pay attention and participates |

STEP 3 DEMONSTRATION |
She carries out some calculations |
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

AREA OF FARMLAND

- Area of farmland

This is the area of shape of the farm.

A = L x B for rectangular

A = ½ bh for triangle.

- Number of plant stand /plant population

This is the number of plants in an area of farm land.

Plant population = ^{Area of spacing of farmland}

^{ spacing}

- Spacing

This is simply the distance between one crop to the next

NOTE:

1 hectare = 10,000m^{2}

**Example 1**

If the length and width of a farmland are 80m x 40m respectively, and the spacing of a maize crop plant is 12cm x 12cm, calculate

(a) the area of the farmland;

(b) the plant population (maize) in the give area;

(c) the total population if there are two plants per stand.

SOLUTION

- a) Area of farmland = Length x Width

= 80m x 40m = 3200m^{2}

(b) Spacing of crop = 12cm x 12cm or 0.12m x 0.12m

Area of 1 stand of crop=0.12m x 0.12m = 0.0144m2

Plant population = __Area of farmland(m ^{2})__

spacing(m^{2})

Plant population = __3200m ^{2}__

0.0144m^{2}

The plant population (maize) is estimated at 222,222 stands

(c) since there are two plants per stand the total plant population = 222,222 x 2 = 444,444 maize plants

The total population= 444,444 maize plants

**EVALUATION: 1. State the formula for calculating the area of farmland, spacing and plant population **

**If the length and width of a farmland are 20m x 20m respectively, and the spacing of a maize crop plant is 40cm x 40cm, calculate**

** (a) the area of the farmland; **

** (b) the plant population (maize) in the give area; **

** (c) the total population if there are two plants per stand.**

** **

**CLASSWORK: As in evaluation**

**CONCLUSION: The teacher commends the students positively**