Effect of rainwater on soil: Rain water helps to increase the ______ to some extent. Consider natural nitrogen fixation in the atmosphere and deposition to soils. Fill the blank with the most appropriate soil property.
General Knowledge
Biology
Difficulty: Easy
Choose an option
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Asoil fertility (nitrogen content of the soil)
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Bsoil salinity
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Csoil acidity in all cases
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Dsoil heavy metal load
Answer
Correct Answer: soil fertility (nitrogen content of the soil)
Explanation
Given data
- Blank asks what rainwater increases to some extent.
Concept / ApproachLightning and atmospheric processes convert N2 to oxides of nitrogen that form nitrates/nitrites, which are deposited by rain, slightly increasing soil nitrogen and thus fertility.
EliminationRain does not generally raise heavy metals or salinity; pH effects vary with local conditions and are not universally increased.
Final AnswerSoil fertility (nitrogen content).