Study

Soil and water losses by rainfall erosion influenced by tillage methods, slope-steepness classes, and soil fertility levels

  • Published source details Cogo N.P., Levien R. & Schwarz R.A. (2003) Soil and water losses by rainfall erosion influenced by tillage methods, slope-steepness classes, and soil fertility levels. Revista Brasileira de Ciência do Solo, 27, 743-753.

Actions

This study is summarised as evidence for the following.

Action Category

Change tillage practices

Action Link
Soil Fertility
  1. Change tillage practices

    A controlled, replicated experiment in 1994-1996 on clay in Brazil (Cogo et al. 2003) found the lowest soil loss under crops with no-till (1 t/ha), followed by crops under reduced tillage (4 t/ha) compared to conventional ploughing with crops (13 t/ha) and conventional ploughing on bare soil (80 Mg/ha in one crop cycle). Water losses were very low with no difference between treatments. On slopes 0.035, 0.065 and 0.095 m/m-1 gradient, the following treatments were applied after harvest of  soybean Glycine max and black oat Avena strigosa crops: conventional tillage (20 cm depth), reduced tillage (8 cm depth), and no-till. There was an additional bare soil treatment under conventional tillage. Plots were 24 x 50 m and replicated three times. Tillage and planting operations were performed along contour lines in all plots except one where ploughing/disking operations were performed up-and-down-slope. Rain gauges were installed to measure runoff.

     

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