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Purpose <p>The impact of gully filling on soil quality in agricultural crops remains a topic rarely explored in the literature. In this study, soil quality and crop yield assessments were conducted in the Campiña of Southern Spain, near the city of Córdoba, to evaluate the effects of filling operations associated with a gully rehabilitation project. </p> Methods <p>Soil and crop yield samples were collected from both disturbed and undisturbed sites within and around two gullies that were filled five years before the study and another two gullies filled one year before. A single soil quality indicator (SQI) was developed, and its spatial and temporal dynamics were analyzed to quantify the impact of gully filling. </p> Results <p>Elevation maps revealed cut depths up to 0.9&#xa0;m and fill depths of up to 2&#xa0;m between 2014 and 2020. The depth of filling operations and proximity to the gully were found to reduce soil quality at the sampling locations. The deviation of observed SQI values from those expected based on their topographic setting indicated a reduction in soil quality, down to 60% in disturbed areas due to filling operations. These same locations also experienced up to a 90% decrease in crop production, with sunflower being more affected than wheat. </p> Conclusion <p>Gully filling should be conducted with minimal impact on the soil and accompanied by complementary rehabilitation strategies.</p>

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Metrics of soil degradation by recent filling of permanent gullies: a study case on annual rainfed crops at the Campiña landscape (Spain)

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Carlos Castillo,
  • Encarnación V. Taguas,
  • Miguel Vallejo,
  • Rafael Pérez,
  • Robert R. Wells,
  • Ronald L. Bingner,
  • Helena Gómez-MacPherson

摘要

Purpose

The impact of gully filling on soil quality in agricultural crops remains a topic rarely explored in the literature. In this study, soil quality and crop yield assessments were conducted in the Campiña of Southern Spain, near the city of Córdoba, to evaluate the effects of filling operations associated with a gully rehabilitation project.

Methods

Soil and crop yield samples were collected from both disturbed and undisturbed sites within and around two gullies that were filled five years before the study and another two gullies filled one year before. A single soil quality indicator (SQI) was developed, and its spatial and temporal dynamics were analyzed to quantify the impact of gully filling.

Results

Elevation maps revealed cut depths up to 0.9 m and fill depths of up to 2 m between 2014 and 2020. The depth of filling operations and proximity to the gully were found to reduce soil quality at the sampling locations. The deviation of observed SQI values from those expected based on their topographic setting indicated a reduction in soil quality, down to 60% in disturbed areas due to filling operations. These same locations also experienced up to a 90% decrease in crop production, with sunflower being more affected than wheat.

Conclusion

Gully filling should be conducted with minimal impact on the soil and accompanied by complementary rehabilitation strategies.