Question

Arrange the following factors affecting irrigation water quality in agriculture in the correct sequence:
(A) Salinity
(B) pH
(C) Sediment content
(D) Chemical contaminants

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

Hint:

Assess water quality by salinity, pH, sediment, then chemical contaminants.

Answer 1

The Correct Option is A

Step 1: Rank the four water-quality factors by how directly they affect crop growth and irrigation systems.
Step 2: Salinity affects root osmotic uptake most directly, so it ranks first, followed by pH which governs nutrient availability.
Step 3: Sediment content mainly affects equipment, and chemical contaminants are the most situation-specific, so they rank last.
Step 4: Correct sequence, Salinity, pH, Sediment content, Chemical contaminants, that is option (A), (B), (C), (D).