pH of alkaline soil is:

Correct option is D

✅ (d) 9: • Alkaline soils have a pH > 8.5, often ranging up to 9.5 or higher. • High pH is due to excessive sodium carbonate/bicarbonate content. • Common in sodic or alkali soils that reduce nutrient availability and affect crop growth.
❌ (a) 6: • Acidic soil pH.
❌ (b) 7: • Neutral pH.
❌ (c) 8: • Slightly alkaline, but not representative of strongly alkaline soils.