Soil organic carbon and nutrient content in aggregate-size fractions of a subtropical rice soil under variable tillage

  • Published source details Jiang X., Hu Y., Bedell J. H., Xie D. & Wright A.L. (2011) Soil organic carbon and nutrient content in aggregate-size fractions of a subtropical rice soil under variable tillage. Soil Use and Management, 27, 28-35.


This study is summarised as evidence for the following.

Action Category

Change tillage practices

Action Link
Soil Fertility
  1. Change tillage practices

    A randomized, replicated experiment in 2007 on an Anthrosol (soil greatly modified by human activity) in the Sichuan Basin, China (Jiang et al. 2011) found that tillage affected soil fertility mainly by changing soil structure. Soil organic carbon, nitrogen, and phosphorus were roughly 23% higher under ridge no-tillage than conventional tillage. Calcium levels were also higher under ridge no-tillage (13.92 cmol Ca2+/kg average) than conventional tillage (13.25 cmol Ca2+/kg average). Conventional tillage reduced soil stability by 35% compared with ridge no-tillage. The crop was rice Oryza sativa followed by winter rape Brassica napus. There were four replications of two tillage regimes started in 1990: ridges with no-tillage (ridges from prior ploughing/harrowing kept intact), conventional tillage (ploughing/harrowing to 20-30 cm depth). Plots were 4 x 5 m. Soil samples were collected and soil organic carbon, nitrogen, phosphorus, calcium and magnesium were measured.


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