Question
In case of degraded alkali soil, if the extensive
leaching of saline-sodic soil occurs in absence of any source of calcium and magnesium, part of exchangeable Na is frequently replaced by __ ?Solution
If extensive leaching of a saline-sodic soil occurs in the absence of any source of calcium or magnesium, part of the exchangeable sodium is gradually replaced by hydrogen. Such soil may be slightly acidic in nature, yet it may contain enough sodium to give it an unstable structure. Such a soil is designated as a degraded sodic soil, earlier known as degraded alkali soil.
Change the question mark with the option that follows the applied logic in the first pair.
J : P :: M : ??
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