2010
DOI: 10.1071/sr09074
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Diagnosis, extent, impacts, and management of subsoil constraints in the northern grains cropping region of Australia

Abstract: Productivity of grain crops grown under dryland conditions in north-eastern Australia depends on efficient use of rainfall and available soil moisture accumulated in the period preceding sowing. However, adverse subsoil conditions including high salinity, sodicity, nutrient imbalances, acidity, alkalinity, and high concentrations of chloride (Cl) and sodium (Na) in many soils of the region restrict ability of crop roots to access this stored water and nutrients. Planning for sustainable cropping systems requir… Show more

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Cited by 56 publications
(50 citation statements)
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References 23 publications
(28 reference statements)
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“…The sodic site had significantly higher ESP > 6% up to 0.6 m soil depth. A value of ESP ≥ 6% in the surface soil would result in poor germination and water intake in soil [2,25]. The sodic site had Cl concentrations > 800 mg·kg −1 approximately below 0.9 m soil depth, a threshold that generally results in reduced water and nutrient uptake and yield reduction in barley, and more so in bread wheat [4].…”
Section: Soil Constraintsmentioning
confidence: 99%
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“…The sodic site had significantly higher ESP > 6% up to 0.6 m soil depth. A value of ESP ≥ 6% in the surface soil would result in poor germination and water intake in soil [2,25]. The sodic site had Cl concentrations > 800 mg·kg −1 approximately below 0.9 m soil depth, a threshold that generally results in reduced water and nutrient uptake and yield reduction in barley, and more so in bread wheat [4].…”
Section: Soil Constraintsmentioning
confidence: 99%
“…High sodicity in surface and subsoil, high salinity and phytotoxic concentration of chloride (Cl) in subsoil, and alkaline surface soils with acidic subsoil are common soil constraints in many dryland Vertosols of the semi-arid, sub-tropical regions of north-eastern Australia [1,2]. Sodic soils tend to have severe soil structural problems, poor aeration, and restricted water transmission, resulting in reduced There were two major aims of this study.…”
Section: Introductionmentioning
confidence: 99%
“…Several of these constraints may occur together in some soils (Dang et al 2006(Dang et al , 2010. The hostile subsoils restrict the movement of air and water and limit root growth, leading to waterlogging, variable rooting depth and poor water use efficiency (McDonald et al 2012).…”
mentioning
confidence: 99%
“…These subsoil constraints include boron toxicity (Adcock et al 2007), contamination with resistant herbicides (Jayawardane and Chan 1994), sodicity and salinity, acidity (O'Leary et al 2004;Dang et al 2010;Zhang et al 2006), nutrient deficiency and toxicity (Yunusa and Newton 2003;MacEwan et al 2010), compaction (Lisson et al 2007;Dang et al 2010), low permeability and water logging (Kirkegaard et al 2006;Swan et al 2011), low organic matter content and activity of beneficial soil biota (Scott et al 1997;Mead et al 2005). Several of these constraints may occur together in some soils (Dang et al 2006(Dang et al , 2010.…”
mentioning
confidence: 99%
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