Question

Which is the correct sequence to connect various components of sprinkler irrigation systems in groundnut field?
(A) Pump-Course Filter- Fine Filter-Fertilizer Tank- Main Line-Laterals-Risers-Sprinklers.
(B) Pump-Fertilizer Tank-Course Filter- Fine Filter- Main Line-Lateral-Riser-Sprinkler.
(C) Pump-Course Filter- Fine Filter-Fertilizer Tank-Laterals- Main Line-Risers - Sprinkler.
(D) Pump-Fertilizer Tank-Course Filter- Fine Filter-Lateral- Main Line-Riser-Sprinkler.
Choose the correct answer from the options given below:

• A. (A), (B), (C), (D).
• B. (A), (B) and (C) only.
• C. (A) and (B) only.
• D. (A) only.

Hint:

For any micro-irrigation system layout:
Water always flows from high pressure to low pressure, so the sequence must start with the Pump and end with the Sprinklers/Emitters.
Filtration must always happen *before* the water enters the Main Line and Laterals to prevent clogs.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
A sprinkler irrigation system applies water in a manner simulating natural rainfall.
To ensure safe, clog-free, and efficient operation (especially when practicing fertigation), the components of the system must be connected in a specific, logically designed sequence.

Step 2: Detailed Explanation:
Let us trace the correct flow of water through the sprinkler system components:
1. Pump: Draws water from the source and pressurizes it.
2. Course Filter (Primary Filtration): Placed immediately after the pump to trap large sand, silt, and organic debris.
3. Fine Filter (Secondary Filtration): Screens out remaining fine particles to prevent clogging.
4. Fertilizer Tank (Fertigation): Placed after the filtration system (or in a parallel bypass setup) so that dissolved fertilizers are introduced into the clean water stream.
5. Main Line: Carries the pressurized, filtered water (and dissolved fertilizers) from the head unit to the sub-mains or directly to the field.
6. Laterals: Smaller pipes branching off the main line, laid out across the crop rows (groundnut field) to distribute water closer to the plants.
7. Risers: Vertical pipes connected to the laterals at regular intervals to raise the sprinkler heads above the crop canopy.
8. Sprinklers (Nozzles): Mounted on top of the risers, these rotate and spray water as fine droplets over the field.
Comparing this sequence with the options:
Sequence (A) perfectly represents the correct, standard engineering layout.
Therefore, only sequence (A) is correct.

Step 3: Final Answer:
The correct option is (D).