Role of vertical soil mixing in modulating soil respiration along slope and tillage gradients in the Indian Himalayan agricultural lands (Record no. 292040)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02686nam a2200181 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 551.6 |
| Item number | VIS/RO PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Vishwal Madhav, P |
| 245 ## - TITLE STATEMENT | |
| Title | Role of vertical soil mixing in modulating soil respiration along slope and tillage gradients in the Indian Himalayan agricultural lands |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellanikkara |
| Name of publisher, distributor, etc | College of climate change and environmental science |
| Date of publication, distribution, etc | 2024 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | xvi,163p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc |
| 520 3# - SUMMARY, ETC. | |
| Abstract | Soil respiration (Rs), the second largest terrestrial carbon (C) flux, is becoming an essential area of study under rising global atmospheric carbon dioxide (CO2) and more intense climate change patterns. Erosion-induced soil degradation is predicted to rise with climate change. However, there is a debate on whether soil functions primarily as a C sink or a source of atmospheric CO2 during erosion. The Indian Himalayan region is one of the world's significant soil erosion hotspots. Increased agriculture in these landscapes due to population growth and rising food demands may worsen climate change if soil management is improper. There is a notable lack of study on the role of vertical soil mixing, a prominent process in eroding landscapes that involves mixing topsoil and subsoil and is accelerated by tillage practices. We selected a 6% sloped agricultural field and simulated the vertical soil mixing by manually combining the topsoil and subsoil in a 1:1 ratio at distinct slope locations of conventional (CT), minimum (MT), and no-tilled (NT) plots. Rs measurements were taken from topsoil, subsoil, and mixed soil across all the slope locations. The average mixed-soil Rs rates from mid-slope and downslope locations of NT, MT, and CT were 0.2027 ± 0.0352 and 0.1727 ± 0.0266 g CO2 m 2h-1, 0.1821 ± 0.0232 and 0.1780 ± 0.0227 g CO2 m-2 h-1, 0.1562 ± 0.0118 and 0.1524 ± 0.0070 g CO2 m-2 h-1, respectively. Observed rates of Rs were substantially lower than the expected rates at all the slope locations. The findings indicate that vertical soil mixing due to tillage and erosion will result in negative priming and reduce Rs rates, promoting C storage in tilled plots at mid-slope and downslope locations. In the context of climate change mitigation in hilly areas, proper management strategies need to be explored. The prevailing trend of transitioning to no-till practices for climate change mitigation needs to be further investigated in eroding agricultural areas for climate change mitigation. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | climate change and environmental science |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Vertical siol mixing in modulating soil |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Sankar, M(Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://krishikosh.egranth.ac.in/handle/1/5810225746 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Item type | Theses |
| Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Thesis | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 23/04/2025 | 551.6 VIS/RO PG | 176348 | 23/04/2025 | Theses |