Irrigation Water Conveyance and Application Methods
Subtopic: Design and evaluation of irrigation methods
Question Statement:
Which of the following agronomic and engineering advantages are associated with drip (trickle) irrigation compared to traditional surface flooding methods?
Options:
(A) High water saving ($30\% \text{ to } 60\%$) by virtually eliminating conveyance seepage and deep percolation losses
(B) Ability to irrigate undulating and steep terrain without extensive, expensive land grading
(C) Permits safe utilization of moderately saline irrigation water by maintaining continuous high soil matric potential, thereby diluting soil solution salt concentration
(D) Drastically reduces weed growth by wetting only a fraction of the soil surface around plant rows
Answer Key:
A, B, C, D
Step-by-Step Solution & Explanation
All four statements represent proven engineering advantages of micro-irrigation:
- A: High application efficiencies (gt; 90\%$) conserve water.
- B: Pressurized delivery pipelines adapt to complex topographic relief.
- C: Frequent low-volume wetting maintains low total soil water stress (high matric potential offsets osmotic potential).
- D: Restricted surface wetting starves inter-row weed seeds of moisture.