Unit notes and practice questions
Everything here is for unit 14 of the Grade 11 Agriculture textbook: what the chapter covers, the short notes, practice questions with their answers, and the lesson video where one exists.
The cards filed under this chapter on the Grade 11 Agriculture page. Open one at a time.
When you use it
Use when identifying the four harvesting stages integrated into a single combine harvester machine.
Watch out
The four operations are reaping, threshing, gathering, and winnowing. Baling is performed separately by a baler.
Drafted from Grade 11 Agriculture, pages 225-234, then checked twice before it went up
| Level | Main Power Source | Power Share |
|---|---|---|
| Low level | Manual power (Human) | > 33\% |
| Fair level | Animal power | 34\% - 66\% |
| High level | Mechanical power | 67\% - 100\% |
When you use it
Use to classify agricultural mechanization levels based on dominant power source and percentage share.
Watch out
Low level is defined by manual power exceeding 33 percent, whereas fair level is defined by animal power share.
Drafted from Grade 11 Agriculture, pages 225-234, then checked twice before it went up
| Implement | Primary Function |
|---|---|
| Plough | Soil cultivation and seedbed preparation |
| Subsoiler | Deep tillage to loosen compacted soil |
| Cultivator | Secondary tillage, weed removal, soil pulverizing |
| Cultipacker | Crushing clods, removing air pockets, firming seedbeds |
| Harrow | Smoothing and breaking surface soil lumps |
When you use it
Use to identify and match specific soil tillage tools to their field operations.
Watch out
Do not confuse a subsoiler, which performs deep tillage for compacted subsoil, with a cultivator, which performs rotary secondary tillage.
Drafted from Grade 11 Agriculture, pages 225-234, then checked twice before it went up
10 multiple-choice questions written against this chapter, each with its answer and the reason. Try one before you open the answer.
Question 1
What is the definition of agricultural mechanization?
Answer: A The use of machinery to replace human or animal labor
Why
Farm mechanization is the use of machinery to replace human or animal labor in agricultural activities.
Question 2
Farm mechanization can sometimes negatively affect traditional Ethiopian cooperative work arrangements such as:
Answer: A Debo or Guza
Why
The textbook explains that mechanization may hamper well-established social capitals of farmers, such as traditional labor-sharing practices like Debo or Guza.
Question 3
Which piece of equipment is used to crush soil clods, press small stones, and remove air pockets to form a smooth, firm seedbed?
Answer: A Cultipacker
Why
A cultipacker is designed to crush clods, press down small stones, eliminate cracks, and remove air pockets to prepare a smooth and firm seedbed.
Question 4
An egg incubator uses a fan and heater to keep fertile eggs warm for an incubation period of:
Answer: A 21 days
Why
An incubator is a device with a fan and heater designed to keep fertile eggs warm for their 21-day incubation period.
Question 5
A combine harvester gets its name because it combines which four operations into one process?
Answer: A Reaping, threshing, gathering, and winnowing
Why
A combine harvester is a versatile machine that combines four separate operations: reaping, threshing, gathering, and winnowing into a single process.
Question 6
To avoid rapid deterioration, milk must be cooled to below 4 degrees Celsius within what timeframe after milking?
Answer: A 2 hours
Why
According to the textbook, harvested milk should be cooled down to below 4 degrees Celsius within 2 hours of milking to prevent spoilage.
Question 7
Which tractor-mounted implement is specifically used to break up and loosen soil during deep tillage where soil compaction is a problem?
Answer: A Subsoiler
Why
A subsoiler is used to break up and loosen soil during deep tillage, which helps crop roots grow in compacted soils.
Question 8
According to the textbook, fair level mechanization occurs when:
Answer: A Animal power used is 34 to 66%
Why
Fair level mechanization is categorized by the use of animal power between 34% and 66%.
Question 9
A dairy farmer in Debre Birhan wants to convert cream into butter and buttermilk. Which dairy equipment should be used?
Answer: A Butter churner
Why
A churner (or butter churner) is the specific tool used to convert cream into butter and buttermilk.
Question 10
A commercial wheat farm in Arsi uses mechanical power for 75% of its farming operations. What level of mechanization is this farm operating at?
Answer: A High level mechanization
Why
High level mechanization is defined as having mechanical power use between 67% and 100%. Since 75% falls in this range, the farm operates at a high level of mechanization.
The app holds 12 questions on this unit, marked as you go. These are the first 10.
Unit 14 runs from page 223 to page 231 of the Ministry of Education edition.
Ministry of Education edition, English, 270 pages
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