Impact of tillage on root systems of winter wheat

By R. Qin, P. Stamp, W. Richner. 2004

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Tillage and soil carbon sequestration—What do we really know? (2007, background): “Qin et al. (2004) conducted a comparison of root length density of maize in plowed and no-till soils, and reported that generally root length densities were greater in no-till for the upper 5– 10 cm, but greater in the plowed soil at the deeper depths.”
The Role of Mineral Nutrition on Root Growth of Crop Plants (2011, background): “This may be associated with greater organic matter, nutrients, aeration, and water availability in the top soil layer compared to lower soil depths (Merrill et al., 1996, 2002; Qin et al., 2004; Sainju et al., 2005a; Stone et al., 2001).”
Effect of tillage system on the root growth of spring wheat (2009, background): “By contrast, Qin et al. (2004), in a study of loamy silt and sandy loam soils in Central Europe, reported that NT was associated with an increase in RLD in the uppermost soil layer (0–5 cm), values from 5 cm to 10 cm downwards, similar to those recorded under CT. Benítez-Vega (2006), in the same…”
Reduced tillage effects on soil properties and growth of cereals and associated weeds under organic farming (2011, result): “Similar results were reported by Riley et al. (2008) suggesting that turning the soil brings more unstable, easily degradable soil to the surface while destroying stable aggregates and soil-protecting material (Pagliai et al.”