Summary
This three-year field trial investigated whether intercropping carob with thyme (Thymbra capitata) or clover (Trifolium squarrosum), strategically positioned on the sun-exposed soil side of carob trees, could reduce soil temperature and evaporation sufficiently to offset competitive water stress under semi-arid and arid conditions. Results are presented in comparison with irrigated and rainfed conservation tillage carob monocultures. The study contributes evidence that carefully designed intercropping systems may achieve comparable or superior yield efficiency and a reduced environmental footprint relative to conventional conservation tillage, even under dryland constraints.
UK applicability
The findings are specific to semi-arid Mediterranean dryland conditions and carob-based agroforestry, which have limited direct applicability to UK farming systems. However, the broader principles regarding intercropping design, living mulch placement, and environmental footprint reduction may inform UK agroforestry and silvoarable research, particularly as interest in drought-resilient systems grows under climate change projections.
Key measures
Carob yield (productivity); water use and water relations; soil temperature; evaporation rates; environmental footprint indicators; land equivalent ratio or yield efficiency metrics (inferred)
Outcomes reported
The study measured carob water relations, yield efficiency, and environmental footprints across intercropping and conservation tillage treatments over three years. It compared rainfed intercropping systems (carob with thyme or clover) against irrigated and non-irrigated conservation tillage carob plots under semi-arid and arid conditions.
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