Q.2
Read the following statements
(A) . Saline soils were formerly called white alkali because of the deposits of salts on the surface following evaporation
(B) . Saline soils have an electrical conductivity of the saturated extract EC > 4 dS mt
(C) . Saline soils have pH > 8.5
(D) . They have exchangeable sodium percentage (ESP) <15%.
Choose the correct answer from the options given below:
- Saline Soil Characteristics (US Salinity Laboratory Staff, 1954):
- Statement (A) is correct: Capillary rise and surface evaporation of moisture leave white salt crusts of chlorides and sulfates, historically termed "white alkali".
- Statement (B) is correct: Electrical conductivity of the saturated paste extract ($EC_e$) exceeds $4.0\text{ dS/m}$ at $25^\circ\text{C}$.
- Statement (D) is correct: Exchangeable sodium percentage ($ESP$) is less than $15\%$.
- Statement (C) is incorrect: Saline soils are dominated by neutral salts ($NaCl, Na_2SO_4$), keeping soil pH generally below 8.5 ($pH \lt 8.5$). A $pH \gt 8.5$ is characteristic of sodic (alkali) soils.
- Conclusion: Statements (A), (B), and (D) only are correct. (Correct answer: Option 1)
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
Report
Want to practice this paper in exam conditions?
क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं?
Test yourself in 5-question batch format with timer and hidden answers.
5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode →
प्रैक्टिस टेस्ट मोड शुरू करें →