During a drip irrigation test, what is the next step if pressure variance exceeds 20%?

• A. Adjust the Emitters
• B. Investigate Further Pressure Loss
• C. Increase Pressure
• D. Conduct a Soil Test

Answer: (B)

Investigating further pressure loss is essential if the pressure variance exceeds 20% during a drip irrigation test. This step is crucial because significant pressure fluctuations can indicate several underlying issues, such as leaks, blockages, or improper system design. Identifying the source of the pressure loss allows for targeted repairs or adjustments, ensuring that the irrigation system functions effectively and delivers water uniformly to the plants.

Adjusting the emitters, increasing pressure, or conducting a soil test may be relevant in certain situations but are not the immediate next steps after identifying a considerable pressure variance. Adjusting emitters without addressing the cause of the pressure issue could lead to insufficient water delivery or excessive pressure on certain sections, while simply increasing pressure may exacerbate existing problems. Conducting a soil test could be valuable in assessing plant needs but does not address the mechanical issues of the irrigation system that could affect its performance.