Bridging the Gap: Evaluating Farmers’ Sustainability Perceptions, Their Agricultural Practices, and Measured Soil Indicators Towards Promoting a Sustainable Viticulture

This study investigates the relationships between farmers’ perceptions, their agriculture practices, and objective soil health indicators in a viticultural subzone of the Madrid region, aligning with the EU’s Farm to Fork Strategy. A dual-methodology approach was employed, combining detailed soil chemical and physical analyses with a structured survey of thirty-four local farmers. Soil samples were analyzed for pH, nutrient concentrations (nitrogen, phosphorus, and potassium), and heavy metals (nickel, lead, and cadmium), while the survey captured farmers’ perceptions regarding soil contamination and sustainable practices. Results showed significantly higher levels of nitrogen (0.09% vs. 0.04%), phosphorus (125 vs. 65 mg/kg), and potassium (3100 vs. 1550 mg/kg) in fertilized plots (p < 0.05), while heavy metals remained within safe limits, compared to those not using fertilizers, as confirmed by Mann–Whitney U tests (p < 0.05). However, the impact on heavy metal accumulation was minimal, with only a slight decrease in nickel levels in fertilized plots. Additionally, the survey revealed low adoption rates of conservation agriculture techniques and limited training on sustainable practices, despite strong environmental commitment among farmers. These findings underscore the need for regular soil testing, targeted educational initiatives, and the increased promotion of conservation practices to better align subjective assessments with scientific evidence, ultimately enhancing both productivity and ecological resilience in sustainable viticulture.