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Impact of soil erosion on production in cropping systems .II. Simulation of production and erosion risks for a wheat cropping system

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Littleboy, M., Freebairn, D.M., Hammer, G.L. and Silburn, D.M. (1992) Impact of soil erosion on production in cropping systems .II. Simulation of production and erosion risks for a wheat cropping system. Soil Research, 30 (5). pp. 775-788.

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Article Link(s): https://doi.org/10.1071/SR9920775

Publisher URL: https://www.publish.csiro.au/paper/SR9920775

Abstract

Maintenance of productive soil base by minimizing soil erosion is vital to long-term crop production. In this study, a modelling approach is used to estimate effects of soil erosion on productivity for a wheat cropping system at three locations in northeast Australia, Emerald, Dalby and Gunnedah. Predictions of erosion, runoff and yield decline due to erosion for variations in initial soil depth, slope and fallow management strategy are presented. Rates of yield decline were highest at Emerald due to summer dominance of rainfall resulting in higher runoff during summer fallow periods. On average, soil depth decreased by 0.35 cm year-1 at Emerald, 0.25 cm year-1 at Dalby and 0.1 cm year-1 at Gunnedah for a 5.0% slope, 100 cm initial soil depth and a disc/chisel fallow management strategy. Rates of soil removal and subsequent yield decline were higher for shallower soils, steeper slopes and if management practices provided less stubble cover during the fallow. The productivity half-life concept shows that the productive life of the soil was less than 100 years for some soil depth, climate, slope and management combinations. For other combinations, significant yield decline was predicted after 100 years of cropping. The quantification of erosion-productivity relationships allows us to identify regions of higher risk, to estimate the utility of management options, and provide a basis for focusing research and development of management strategies to preserve long-term production.

Item Type:Article
Business groups:Crop and Food Science
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version is available via Publisher’s website.
Keywords:Erosion Productivity Surface Management Simulation
Subjects:Science > Statistics > Simulation modelling
Agriculture > Agriculture (General) > Soils. Soil science
Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Plant culture > Field crops > Wheat
Deposited On:22 Feb 2022 02:21
Last Modified:22 Feb 2022 02:21

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