Teixeira, P. C. and Misra, R. K. (2005) Measurement and prediction of nitrogen loss by simulated erosion events on cultivated forest soils of contrasting structure. Soil and Tillage Research, 83 (2). pp. 204-217. ISSN 0167-1987
The objectives of this study were to determine nitrogen (N) loss associated with erosion of forest soils and to explore the role of soil structure and other factors governing N enrichment of sediment to aid prediction of N loss. We measured erosion, size distribution of aggregates in the
sediment and N distribution in various aggregate fractions using simulated rainfall on samples of three cultivated forest soils of contrasting structure (repacked in trays) exposed to four erosion conditions. Both sediment loss and N loss increased with slope and kinetic energy of rainfall
suggesting greater dependency of N loss on sediment loss than on N concentration in the sediment.
Irrespective of erosion treatments and soil type, the bulk sediment and its size fractions were mostly richer in N than those of the uneroded soils. The enrichment ratio (ER) and concentration ratio (CR) of N for sediment cast some doubt on the application of raindrop stripping as a
mechanism of N enrichment of sediment for soils of widely differing characteristics. Previously published models of N enrichment of sediment did not predict ER for our soils satisfactorily.
However, an empirical model using published data on erosion and N loss agreed well with the results. This predictive method only requires information on sediment loss that can be easily obtained from an erosion model.
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|Item Type:||Article (Commonwealth Reporting Category C)|
|Item Status:||Live Archive|
|Additional Information:||Copyright 2005 Elsevier: Reproduced in accordance with the copyright policy of the publisher.This is the author-version of the work. It is posted here for your personal use. Use the hypertext links above to access the journal's website.|
|Depositing User:||epEditor USQ|
|Faculty / Department / School:||Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering|
|Date Deposited:||11 Oct 2007 00:20|
|Last Modified:||02 Jul 2013 22:32|
|Uncontrolled Keywords:||enrichment ratio; erosion; forest soils; nitrogen loss; soil structure|
|Fields of Research :||04 Earth Sciences > 0402 Geochemistry > 040202 Inorganic Geochemistry
05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
07 Agricultural and Veterinary Sciences > 0705 Forestry Sciences > 070501 Agroforestry
|Socio-Economic Objective:||D Environment > 96 Environment > 9614 Soils > 961403 Forest and Woodlands Soils|
|Identification Number or DOI:||doi: 10.1016/j.still.2004.07.014|
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