Vegetative cover effects of infiltration and other soil physical parameters in a no-till loess soil
- West Tennessee Experiment Station, Jackson, TN (United States)
- Ames Plantation, Grand Junction, TN (United States); and others
Large-scale conversion of crop-land from annual row crops to tree crops to tree crops could cause significant changes in soil hydraulic properties, including infiltration rates, an important component in environmental impact evaluations. Infiltration rates were measured with double ring infiltrometers, under 50 yr natural forest (F), 12 yr sycamore and pine (OS and P), 1 yr sycamore (YS), soybean (SB), and corn (C), in a Memphis-Loring silt loam intergrade (fine-silty mixed thermic Typic Hapludalf; - fine-silty mixed thermic Typic Fragiudalf). Total organic carbon (TOC), and bulk density (BD) were measured with Walkley-Black method and soil core samples respectively, at two shallow depths. The infiltration and the associated variability were relatively high under F. The steady state infiltration (SSI) rates under F, OS, P, C, SB and YS ranged from 27.3 to 0.61 (CV=91%), 6.1 to 0.83 (CV=66%), 3.3 to 0.16 (CV=62%), 1.68 to 0.3 (CV=63%), 0.82 to 0.30 (CV=44%), and 0.73 to 1.15 (CV=50%), cm hr{sup -1} respectively. Bulk density and TOC were significantly different between different vegetative covers and between depths under each cover; with a negative relationship of SSI to BD (RI{sup 2}=0.86) and a positive relationship to TOC (R{sup 2}=0.75). High SSI under F, and very low under YS and field crops, with medium values under OS and P, indicate and increasing trend of SSI with age of the tree crop.
- OSTI ID:
- 478715
- Report Number(s):
- CONF-960958-; TRN: 97:002640-0107
- Resource Relation:
- Conference: Partnerships to develop and apply biomass technologies, Nashville, TN (United States), 15-19 Sep 1996; Other Information: PBD: 1996; Related Information: Is Part Of Bioenergy `96: Partnerships to develop and apply biomass technologies. Volume I and II; PB: 1171 p.
- Country of Publication:
- United States
- Language:
- English
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