In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?

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Q: (IAS/2021)
In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,243,87,24,37,243,26

keywords: 

{'biogeochemical cycles': [0, 0, 0, 1], 'phosphorus cycle': [0, 0, 0, 1], 'carbon cycle': [0, 0, 0, 2], 'nitrogen cycle': [0, 0, 0, 1], 'sulphur cycle': [0, 0, 0, 1], 'nutrient': [0, 0, 0, 1], 'cycle': [0, 2, 5, 2], 'weathering': [4, 0, 1, 11], 'rocks': [9, 0, 3, 15], 'main source': [1, 0, 0, 2]}

Phosphorus cycle.