Lesson Notes By Weeks and Term v4 - JHS 3

CROP PRODUCTION

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Subject: Science

Class: JHS 3

Term: 1st Term

Week: 10

Grade code: B9.2.3.2.2

Strand code: 2

Sub-strand code: 3

Content standard code: B9.2.3.2

Indicator code: B9.2.3.2.2

Theme: CYCLES

Subtheme: CROP PRODUCTION

Lesson Video

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Performance objectives

Identify and describe the maturity stages of common Ghanaian crops.
Explain the uses of each maturity stage.
Compare crop growth in different soil types.
Evaluate the importance of understanding crop maturity.

Lesson summary

In crop production, knowing the maturity stage of a crop helps farmers, traders, and consumers decide when to harvest, how to use the crop, how to store/transport it, and how it affects animals and the environment. In Ghana, this knowledge reduces post-harvest losses of tomatoes, pepper, plantain, maize, and fruits, improves income, and supports food security. It also helps us understand why the same crop may mature differently on different soils and seedbeds (e.g., sandy soil vs loamy soil; raised bed vs flat bed).

Lesson notes

2.1 Meaning of “Maturity Stage” in Crops A maturity stage is the level of development of a crop at a particular time, especially in relation to harvesting and use.

There are two important types of maturity: Physiological maturity The crop has completed its growth and reached maximum dry matter. Seeds/grains are fully formed (e.g., maize kernels hard; black layer in maize). Harvesting at this stage is best for seed, grain storage, and long shelf-life. Harvest (or commercial) maturity The crop is at the best stage for the intended use/market. Example: tomatoes may be harvested at breaker stage (slightly turning colour) for transport to distant markets, even though they are not fully red.

Key idea: A crop can be harvested before full physiological maturity if the purpose is different (e.g., vegetables eaten tender).

2.2 Common Maturity Stages and Indicators (Signs)

Evaluation guide

Explain the specific use(s) of each maturity stage of different crops to
humans, other crops, animals, and the environment.
Discuss the differences in maturity stages among the different crops
on the different soil media and seed beds.