Question

Saline-sodic soils, a distinct category of salt-affected soil differing from purely saline or purely sodic soils, are characterized by simultaneously high levels of both soluble salts and exchangeable sodium. Despite this combined salt burden, the soil pH of saline-sodic soils typically remains:

A Above 10,
B Above 4,
C Less than 8.5,
D Exactly 7.0
E Above 9.5 at all times
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