Spanish vineyard thrives for more than 20 years without irrigation or pesticides, boosting soil organic matter

Representative Image (AI-generated) For more than two decades, the soil between rows of grapevines in a Spanish vineyard has remained covered with spontaneous vegetation instead of being repeatedly tilled. The unusual approach was associated with a striking difference beneath the vines: soil managed with long-term vegetation cover contained more than twice as much organic matter in its top layer as nearby soil that was conventionally tilled. The finding offers a glimpse into how leaving the ground undisturbed and maintaining plant cover could help improve soil health in dry, water-limited vineyards. The findings come from a 2026 study published in Frontiers in Soil Science, which compared a rainfed vineyard in central Spain managed with spontaneous cover cropping for more than 20 years with an adjacent vineyard managed through conventional tillage. Researchers examined physical, chemical and biological characteristics of the soils, including organic matter, porosity, water retention, nutrients and microbial activity.Two different ways of managing soilThe study was conducted near Mota del Cuervo in Cuenca province, in central Spain. The region has a semi-arid Mediterranean climate, ...