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Rates of Change in Soil Structural Stability under Forages and Corn
Abstract
Abstract Data on rates of change in soil structural stability under different cropping systems are scarce. Field measurements of changes in dispersible clay (DC) and wet aggregate stability (WAS) were made during 3 yr in six forage treatments and conventional and zero‐till corn ( Zea mays L.). The study was conducted on a silt loam soil (fine‐silty, mixed, mesic Typic Haplaquept intergrading to fine‐silty, mixed, mesic Typic Eutrochrept) near Elora, ON, Canada. The DC and WAS changed exponentially with soil water content at time of sampling and were adjusted for this parameter before calculating changes with time. No increases in structural stability occurred during the 3‐yr time period within the corn treatments. In contrast, all of the forage treatments resulted in highly significant rates of structural improvement. A half‐life parameter was used to quantify these changes. Calculated half lives for the different forages were similar in magnitude, being approximately 2.7 and 5.4 yr for DC and WAS, respectively. Across the treatments, highly significant correlations were found between rates of structural stabilization and mean root length ( r = −0.57 for WAS, significant at P = 0.01), mean root weight ( r = −0.56 for DC and −0.65 for WAS, significant at P = 0.01) and the coefficient of variation for soil water content ( r = −0.64 for DC and −0.56 for WAS, significant at P = 0.01). Forages may promote structural improvement through their influence on the amplitude of wetting and drying cycles. In addition, large increases in stability were observed over the intervening winter months, suggesting a freeze‐thaw effect.
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Overwinter changes in soil structural attributes from freeze-thaw cycles may also contribute to lower SBD in near-surface depths.
“Overwinter changes in soil structural attributes from freeze-thaw cycles may also contribute to lower SBD in near-surface depths (Perfect et al., 1990), though investigations on this topic are scarce.”
From Field-scale soil property changes under switchgrass managed for bioenergy (2011) · cites this paper as Perfect et al., 1990
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Metadata
- Authors
- Perfect, E., Kay, B. D., van Loon, W. K. P., Sheard, R. W., & Pojasok, T.
- Corresponding author
- Perfect, E.
- ORCID
- Perfect, E.
- Venue
- Soil Science Society of America Journal
- Publisher
- Wiley
- Published
- 1990-01
- Volume
- 54
- Issue
- 1
- Pages
- 179-186
- ISSN
- 0361-5995 (ISSN-L)
- 1435-0661
- OpenAlex
- W2037913697
- Cited by
- 104
- References
- 0
- Citations by year
- 2025: 3 · 2024: 2 · 2023: 3 · 2022: 2 · 2020: 4 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 1 · 2012: 1
- FWCI
- 20.22
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soil Science Society of America Journal (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Management and Crop Yield
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil erosion and sediment transport
- Physical Sciences › Engineering › Civil and Structural Engineering › Soil and Unsaturated Flow
- Keywords
- soil aggregate stability, wet aggregate stability, forage crops, conventional tillage, half-life, root length, root weight, soil moisture, wetting-drying cycles, freeze-thaw effects, silt loam soil
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