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Olive Cultivation, its Impact on Soil Erosion and its Progression into Yield Impacts in Southern Spain in the Past as a Key to a Future of Increasing Climate Uncertainty

Author

Listed:
  • José A. Gómez

    () (Institute for Sustainable Agriculture, CSIC, Alameda del Obispo s/n. Córdoba 14004, Spain)

  • Juan Infante-Amate

    (Agroecosystems History Laboratory, Pablo de Olavide University, Carretera de Utrera, km 1, Sevilla 41013, Spain)

  • Manuel González de Molina

    () (Agroecosystems History Laboratory, Pablo de Olavide University, Carretera de Utrera, km 1, Sevilla 41013, Spain)

  • Tom Vanwalleghem

    () (Department of Agronomy, University of Cordoba, Campus de Rabanales, Córdoba 14014, Spain)

  • Encarnación V. Taguas

    () (Department of Rural Engineering, University of Cordoba, Campus Rabanales, Córdoba 14014, Spain)

  • Ignacio Lorite

    () (IFAPA-Alameda del Obispo. Avda. Menenez Pidal s/n. Córdoba 14004, Spain)

Abstract

This article is intended as a review of the current situation regarding the impact of olive cultivation in Southern Spain (Andalusia) on soil degradation processes and its progression into yield impacts, due to diminishing soil profile depth and climate change in the sloping areas where it is usually cultivated. Finally, it explores the possible implications in the regional agricultural policy these results might have. It tries to show how the expansion and intensification of olive cultivation in Andalusia, especially since the late 18th century, had as a consequence an acceleration of erosion processes that can be identified by several indicators and techniques. Experimental and model analysis indicates that the rate of soil erosion accelerated since the expansion of mechanization in the late 1950s. In addition, that unsustainable erosion rates have prevailed in the region since the shift to a more intense olive cultivation systems by the end of the 17th Century. Although agroenvironmental measures implemented since the early 2000s have reduced erosion rates, they are still unsustainably high in a large fraction of the olive area in the region. In the case of olive orchards located in steeper areas with soils of lower water-holding capacity (due to coarse texture and stone content), cumulative erosion has already had a high impact on reducing their potential productivity. This is one of the factors that contributes towards increasing the gap between these less intensified orchards in the mountainous areas and those in the hilly areas with more gentle slopes, such as for instance the lower stretches of the Guadalquivir River Valley. In the case of olive orchards in the hilly areas with better soils, easier access to irrigation and lower production costs per unit, the efforts on soil conservation should be oriented towards limiting off-site damage, since the soil water-storage function of these soils may be preserved in the medium term even at the current soil erosion rates. The assessment made in this manuscript should be regarded as an initial approximation, since additional efforts in terms of increasing experimental records (for current or historical erosion) and of improving model analysis, with more comprehensive studies and more robust calibration and validation processes, are required.

Suggested Citation

  • José A. Gómez & Juan Infante-Amate & Manuel González de Molina & Tom Vanwalleghem & Encarnación V. Taguas & Ignacio Lorite, 2014. "Olive Cultivation, its Impact on Soil Erosion and its Progression into Yield Impacts in Southern Spain in the Past as a Key to a Future of Increasing Climate Uncertainty," Agriculture, MDPI, Open Access Journal, vol. 4(2), pages 1-29, June.
  • Handle: RePEc:gam:jagris:v:4:y:2014:i:2:p:170-198:d:36999
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    1. repec:gam:jsusta:v:10:y:2018:i:4:p:1164-:d:140860 is not listed on IDEAS

    More about this item

    Keywords

    olive; history; soil erosion; water balance; Southern Spain; yield; climate change;

    JEL classification:

    • Q1 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture
    • Q10 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - General
    • Q11 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Aggregate Supply and Demand Analysis; Prices
    • Q12 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Micro Analysis of Farm Firms, Farm Households, and Farm Input Markets
    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness
    • Q14 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Finance
    • Q15 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Land Ownership and Tenure; Land Reform; Land Use; Irrigation; Agriculture and Environment
    • Q16 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - R&D; Agricultural Technology; Biofuels; Agricultural Extension Services
    • Q17 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agriculture in International Trade
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy

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