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6.1 Name FOUR important factors that must be considered before deciding on a relevant irrigation method - NSC Agricultural Technology - Question 6 - 2021 - Paper 1
Question 6
6.1 Name FOUR important factors that must be considered before deciding on a relevant irrigation method. 6.2 What are the main goals with irrigation scheduling? 6.... show full transcript
Worked Solution & Example Answer:6.1 Name FOUR important factors that must be considered before deciding on a relevant irrigation method - NSC Agricultural Technology - Question 6 - 2021 - Paper 1
Step 1
6.1 Name FOUR important factors that must be considered before deciding on a relevant irrigation method.
Answer
- Type of crop: Understanding the water requirements specific to each crop is crucial as different crops have varying needs.
- Availability of water: Assessing the current water resources and quantity available is important to ensure sustainability.
- Type of irrigation system: Choosing between systems like drip, sprinkler, or surface irrigation based on the landscape and resources.
- Pump type: Selecting the appropriate pump is essential for providing the necessary pressure and flow rate.
Step 2
6.2 What are the main goals with irrigation scheduling?
Answer
- Adequate Water Supply: Ensuring that the plants receive enough water to the root zone.
- Prevent Overwatering: Avoiding excess water to prevent waterlogging and plant stress.
- Soil Management: Allowing the soil to dry out appropriately between watering sessions aids in root health.
Step 3
6.3 Identify TWO structural problems on the sprinkler shown below that can negatively influence efficiency.
Answer
- Springs losing tension: If the tension in the springs decreases, the sprinkler may not operate efficiently, affecting water distribution.
- Blocked nozzles: Clogged nozzles can significantly reduce the water flow, leading to uneven coverage and reduced efficiency.
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Step 7
6.7 Give THREE reasons why it is essential for a farmer to know how to determine the flow rate in a water pipe delivery system.
Answer
- Correct Calibration: Ensuring the system is calibrated accurately for proper functioning.
- Effective Scheduling: Adjusting irrigation schedules based on flow rates to manage water usage effectively.
- Prevent Overuse: Avoiding over-utilization of water resources helps in sustainable farming.
Step 8
6.8.1 Name THREE advantages of centre-pivot irrigation systems.
Answer
- Labour Efficiency: Requires less manual effort to manage the irrigation systems.
- One-Man Operation: Can be operated by a single person, increasing operational efficiency.
- Automated Scheduling: Enables automated management of irrigation schedules.
Step 9
6.8.2 Which THREE elements are built into the design of a centre-pivot irrigation system to ensure uniform distribution of water along the system?
Answer
- Distribution Pattern of Sprayers: Ensures even coverage across the field.
- Nozzle Diameter Adjustment: Allows for proportional distribution of water based on the crop's needs.
- Spacing Between Sprayers: Properly calculated to optimize water flow and distribution.