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DOI: | 10.2136/sssaj2006.0307 |
Web URL(s): | https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2006.0307 Last checked: 02/28/2024 Access conditions: Item is within a limited-access website https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2006.0307 Last checked: 02/28/2024 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Udawatta, Ranjith P.;
Anderson, Stephen H.;
Gantzer, Clark J.;
Garrett, Harlod E. |
Author Affiliation: | Udawatta and Garrett: Center for Agroforestry; Udawatta, Anderson, and Gantzer: Department of Soil, Environmental and Atomspheric Sciences, School of Natural Resources, University of Missouri, Columbia, Missouri |
Title: | Agroforestry and grass buffer influence on macropore charcteristics: A computed tomography analysis |
Section: | Soil and water management and conservation Other records with the "Soil and water management and conservation" Section
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Source: | Soil Science Society of America Journal. Vol. 70, No. 5, September/October 2006, p. 1763-1773. |
Publishing Information: | Madison, WI: Soil Science Society of America |
# of Pages: | 11 |
Keywords: | TIC Keywords: Filter strips; Erosion control; Macropores; Woodland landscapes; Infiltration; Saturated hydraulic conductivity; Core sampling; Aerification cores
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Abstract/Contents: | "Although agroforestry and grass filter strips have been identified as possible land management practices to reduce nonpoint-source pollution from row-crop agriculture, their effects on detailed soil pore characteristics are rare. The objective of this study was to compare the effects of agroforestry and grass buffers on computed tomography (CT)-measured macropore (diam. >1000 μm) and coarse mesopore (diam. 200-1000 µm) parameters and to examine relationships between CT-measured pore parameters and saturated hydraulic conductivity (Ksat). Samples were collected from a no-till corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotational watershed with pin oak (Quercus palustris Muenchch.) and cool season grass-legume buffers established in 1997. Soils in the sampling region are mapped as Putnam silt loam (fine, smectitic, mesic Vertic Albaqualf). Undisturbed soil cores (76 by 76 mm) from tree buffer, grass buffer, and row crop areas were collected with six replicates. Five CT images were acquired from each soil core using a hospital CT scanner with 0.2 by 0.2 mm pixel resolution with 0.5-mm slice thickness. Computed tomography images were compared by depth within and among treatments. Soil from the tree and grass buffer treatments had significantly (p ≤ 0.01) greater number of pores, number of macropores, area for the largest pore, macroporosity, mesoporosity and significantly lower circularity than soil from the row crop treatment. Soil under trees, grass, and crop areas on average had 207, 87, and 44 CT-measured pores on a 3632 mm2 area, respectively. Soil under the trees had 2.5 and 3.6 times greater number of macropores than grass and crop areas, respectively. Computed tomography-measured number of macropores explained 64% of the variation for Ksat. Computed tomography-measured parameters that were correlated with saturated hydraulic conductivity included macroporosity, mesoporosity, area of the largest pore, macropore circularity, and number of pores. Results showed that CT-measured pore parameters can be used to predict saturated hydraulic conductivity as affected by land management practices. The study also showed that buffer practices improve soil pore parameters related to soil water infiltration." |
Language: | English |
References: | 55 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Udawatta, R. P., S. H. Anderson, C. J. Gantzer, and H. E. Garrett. 2006. Agroforestry and grass buffer influence on macropore charcteristics: A computed tomography analysis. Soil Sci. Soc. Am. J. 70(5):p. 1763-1773. |
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| DOI: 10.2136/sssaj2006.0307 |
| Web URL(s): https://acsess.onlinelibrary.wiley.com/doi/10.2136/sssaj2006.0307 Last checked: 02/28/2024 Access conditions: Item is within a limited-access website https://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj2006.0307 Last checked: 02/28/2024 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: S 590 .S65 |
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