6.1 The pictures below show TWO types of irrigation systems (A and B) - NSC Agricultural Technology - Question 6 - 2018 - Paper 1
Question 6
6.1 The pictures below show TWO types of irrigation systems (A and B).
State THREE advantages of system A over system B.
6.2 Name THREE data sources that the irrig... show full transcript
Worked Solution & Example Answer:6.1 The pictures below show TWO types of irrigation systems (A and B) - NSC Agricultural Technology - Question 6 - 2018 - Paper 1
Step 1
State THREE advantages of system A over system B.
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Ease of Installation: System A is less expensive to install compared to system B, making it more accessible for users.
Modularity: It consists of sections that can be easily disconnected, allowing flexibility in setup.
Reduced Damage: System A causes less crop damage because it is designed for smaller or square-shaped fields.
Step 2
Name THREE data sources that the irrigation management mechanism – smart controller – uses to determine local weather conditions.
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Soil Sensor: Measures moisture levels in the soil to optimize watering schedules.
Rain Sensors: Detect rainfall to avoid unnecessary irrigation.
Weather Station: Provides local weather data, including temperature and humidity, for better decision-making.
Step 3
Recommend what a farmer should consider before choosing a type of irrigation system for a piece of land.
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Size of the Area: Evaluate how much land needs irrigation to determine system capacity.
Shape of the Land: Consider how the landscape may affect water distribution.
Water Availability: Assess the amount of water available for irrigation to choose an efficient system.
Step 4
Name THREE instances where flood irrigation would be preferred over sprinkler irrigation.
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Abundant Water Supply: When water is plentiful, flood irrigation is efficient.
Landscape Suitability: Flat lands make flood irrigation feasible and effective for water absorption.
Low Setup Cost: If financial resources are limited, flood irrigation may involve lower initial setup costs.
Step 5
Identify the mistakes in the design drawing of the septic tank above.
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Inlet Position: The inlet must be higher than the wall to ensure proper flow.
Outlet Position: The outlet should be positioned lower than the wall to facilitate drainage.
Step 6
Name THREE items that must NOT be flushed down a septic tank drainage system.
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Non-degradable Items: Plastics and similar materials that do not break down.
Chemicals: Disinfectants and bleach can harm the microbial balance of the tank.
Paper Products: Paper towels and similar items can clog and disrupt drainage.
Step 7
What will happen in a septic tank drainage system if the bacteria are destroyed?
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The system will malfunction as it will no longer decompose waste effectively, leading to overfilling and potential leakage.
Step 8
Name TWO factors that determine the cleaning of a septic tank.
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Amount of Waste: The more waste entering the system, the more frequently it needs cleaning.
Bacterial Health: The efficiency of the bacteria in breaking down waste affects cleaning frequency.
Step 9
Calculate the flow rate (litres per minute) in a water-delivering system using the data below:
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Flow rate is calculated using the formula: Flow rate = capacity / time:
