{"id":91865,"date":"2025-06-01T11:08:06","date_gmt":"2025-06-01T11:08:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91865"},"modified":"2025-06-01T11:08:06","modified_gmt":"2025-06-01T11:08:06","slug":"in-case-of-which-one-of-the-following-biogeochemical-cycles-the-weath","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-case-of-which-one-of-the-following-biogeochemical-cycles-the-weath\/","title":{"rendered":"In case of which one of the following biogeochemical cycles, the weath"},"content":{"rendered":"

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?<\/p>\n

[amp_mcq option1=”Carbon cycle” option2=”Nitrogen cycle” option3=”Phosphorus cycle” option4=”Sulphur cycle” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC IAS – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nOption C is the correct answer. In the phosphorus cycle, the main reservoir of phosphorus is in rocks and minerals. Weathering of these rocks releases phosphorus into the soil and water.
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\nThe phosphorus cycle is unique among major biogeochemical cycles in that it does not have a significant atmospheric gaseous phase. The primary source of phosphorus for ecosystems is the slow weathering of phosphate-bearing rocks.
\n<\/section>\n
\nThe carbon cycle involves atmospheric CO2, oceans, biomass, and fossil fuels. The nitrogen cycle primarily involves atmospheric nitrogen (N2) fixed by microbes, as well as organic matter decomposition. The sulphur cycle involves minerals (sulfates), atmospheric gases (SO2, H2S), and biological processes. While rocks can be a source in other cycles (e.g., sulfates in gypsum), rock weathering is the fundamental initial step that makes phosphorus available in most ecosystems.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

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? [amp_mcq option1=”Carbon cycle” option2=”Nitrogen cycle” option3=”Phosphorus cycle” option4=”Sulphur cycle” correct=”option3″] This question was previously asked in UPSC IAS – 2021 Download PDFAttempt Online Option C is the correct answer. … <\/p>\n

Detailed SolutionIn case of which one of the following biogeochemical cycles, the weath<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1110,1367,1136],"class_list":["post-91865","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1110","tag-ecology","tag-environment-and-ecology","no-featured-image-padding"],"yoast_head":"\nIn case of which one of the following biogeochemical cycles, the weath<\/title>\n<meta name=\"description\" content=\"Option C is the correct answer. In the phosphorus cycle, the main reservoir of phosphorus is in rocks and minerals. Weathering of these rocks releases phosphorus into the soil and water. The phosphorus cycle is unique among major biogeochemical cycles in that it does not have a significant atmospheric gaseous phase. The primary source of phosphorus for ecosystems is the slow weathering of phosphate-bearing rocks.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/in-case-of-which-one-of-the-following-biogeochemical-cycles-the-weath\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In case of which one of the following biogeochemical cycles, the weath\" \/>\n<meta property=\"og:description\" content=\"Option C is the correct answer. In the phosphorus cycle, the main reservoir of phosphorus is in rocks and minerals. Weathering of these rocks releases phosphorus into the soil and water. The phosphorus cycle is unique among major biogeochemical cycles in that it does not have a significant atmospheric gaseous phase. The primary source of phosphorus for ecosystems is the slow weathering of phosphate-bearing rocks.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-case-of-which-one-of-the-following-biogeochemical-cycles-the-weath\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:08:06+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"In case of which one of the following biogeochemical cycles, the weath","description":"Option C is the correct answer. 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