{"id":86884,"date":"2025-06-01T04:22:37","date_gmt":"2025-06-01T04:22:37","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86884"},"modified":"2025-06-01T04:22:37","modified_gmt":"2025-06-01T04:22:37","slug":"which-one-of-the-following-is-correct-5","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-correct-5\/","title":{"rendered":"Which one of the following is correct?"},"content":{"rendered":"

Which one of the following is correct?<\/p>\n

[amp_mcq option1=”In humid tropical region, humus content is high in soil” option2=”Glacial till exhibits deep horizon” option3=”Humus accumulates in cold climate” option4=”In equatorial climates, humus content is high in soil” correct=”option3″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC Geoscientist – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\n– A) In humid tropical regions, high temperatures and high rainfall lead to rapid decomposition of organic matter by microbes, resulting in low humus content in the soil. (Incorrect)
\n– B) Glacial till is unconsolidated glacial sediment and serves as a parent material for soil development. While soils *can* develop on till, the till itself doesn’t “exhibit deep horizons”; soil horizons (A, B, C) develop *within* the soil profile over time through pedogenic processes. Glacial action often mixes material rather than creating distinct deep horizons in the till layer itself. (Incorrect)
\n– C) In cold climates, low temperatures significantly slow down the rate of decomposition of organic matter by microorganisms. This leads to the accumulation of undecomposed or partially decomposed organic matter, forming a thicker layer of humus (or organic horizons like O horizon) on or in the soil. (Correct)
\n– D) Equatorial climates are humid tropical regions with rapid decomposition, leading to low humus content. (Incorrect, same reason as A).
\n<\/section>\n
\n– Decomposition rate of organic matter is highly dependent on temperature and moisture.
\n– Cold climates slow down decomposition, promoting humus accumulation.
\n– Warm, humid climates accelerate decomposition, limiting humus accumulation.
\n<\/section>\n
\nHumus is stable, dark organic matter that remains after the decomposition of plant and animal residues. It is crucial for soil structure, water retention, and nutrient availability. Soils in environments like tundra or boreal forests often have significant organic horizons due to slow decomposition rates.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is correct? [amp_mcq option1=”In humid tropical region, humus content is high in soil” option2=”Glacial till exhibits deep horizon” option3=”Humus accumulates in cold climate” option4=”In equatorial climates, humus content is high in soil” correct=”option3″] This question was previously asked in UPSC Geoscientist – 2022 Download PDFAttempt Online – A) In humid … <\/p>\n

Detailed SolutionWhich one of the following is correct?<\/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":[1091],"tags":[1108,1219,1106],"class_list":["post-86884","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1108","tag-the-soil","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is correct?<\/title>\n<meta name=\"description\" content=\"- A) In humid tropical regions, high temperatures and high rainfall lead to rapid decomposition of organic matter by microbes, resulting in low humus content in the soil. (Incorrect) - B) Glacial till is unconsolidated glacial sediment and serves as a parent material for soil development. While soils *can* develop on till, the till itself doesn't "exhibit deep horizons"; soil horizons (A, B, C) develop *within* the soil profile over time through pedogenic processes. Glacial action often mixes material rather than creating distinct deep horizons in the till layer itself. (Incorrect) - C) In cold climates, low temperatures significantly slow down the rate of decomposition of organic matter by microorganisms. This leads to the accumulation of undecomposed or partially decomposed organic matter, forming a thicker layer of humus (or organic horizons like O horizon) on or in the soil. (Correct) - D) Equatorial climates are humid tropical regions with rapid decomposition, leading to low humus content. (Incorrect, same reason as A). - Decomposition rate of organic matter is highly dependent on temperature and moisture. - Cold climates slow down decomposition, promoting humus accumulation. - Warm, humid climates accelerate decomposition, limiting humus accumulation.\" \/>\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\/which-one-of-the-following-is-correct-5\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is correct?\" \/>\n<meta property=\"og:description\" content=\"- A) In humid tropical regions, high temperatures and high rainfall lead to rapid decomposition of organic matter by microbes, resulting in low humus content in the soil. (Incorrect) - B) Glacial till is unconsolidated glacial sediment and serves as a parent material for soil development. While soils *can* develop on till, the till itself doesn't "exhibit deep horizons"; soil horizons (A, B, C) develop *within* the soil profile over time through pedogenic processes. Glacial action often mixes material rather than creating distinct deep horizons in the till layer itself. (Incorrect) - C) In cold climates, low temperatures significantly slow down the rate of decomposition of organic matter by microorganisms. This leads to the accumulation of undecomposed or partially decomposed organic matter, forming a thicker layer of humus (or organic horizons like O horizon) on or in the soil. (Correct) - D) Equatorial climates are humid tropical regions with rapid decomposition, leading to low humus content. 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