Effectiveness of sloping agricultural land technology on soil fertility status of mid-hills in Nepal

Abstract

Hedgerows with intercropping systems were established at the ICIMOD test and demonstration site at Godawari to assess the effectiveness of Sloping Agricultural Land Technology (SALT) in reducing runoff water volume, controlling soil loss, increasing crop production, and improving soil fertility in the mid-hills of Nepal. Runoff water volume (1996–2002), soil loss (1996–2002) and maize yield (1995–2001), and soil fertility-related parameters were assessed on SALT models with three factors: the type of nitrogen-fixing plant, the farmers’ practice, and fertilizer use. Results showed a significant effect of Alnus nepalensis and/or Indigofera dosua on runoff water volume, soil loss, crop production, soil water retention, and soil nutrients (NPK). Farmers’ practice and fertilization did not play a significant role in reducing runoff water and soil loss. However, farmers’ practice significantly increased crop production. Therefore, integrating soil conservation approaches on SALT systems enhances stable economic output to hills and mountain farmers.

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