Characteristics of vineyard soils derived from Plio‐Quaternary landforms (raña or rañizo) in southern Europe

Abstract

Soil is an essential component in viticulture. The study reported here concerns the assessment of the morphology chemical and physicochemical features of typical, well‐developed and representative evolved Mediterranean soils near Anchuras (Spain, southern Europe), a site with soils that developed on old landforms (Plio‐Quaternary) called ‘raña’ and/or ‘rañizo’. The soils under study were described and sampled by conducting soil surveys. Selected soil properties, such as texture, bulk density, pH, electrical conductivity (EC), cation exchange capacity (CEC) and contents of organic matter, nutrients, etc., were analysed using standard procedures. The results showed that these landscape surfaces were, linked with specific soil properties such as low pH (from 4.4 to 5.3) and EC (from 0.15 to 0.02 dSm−1), clay contents (20.1%–48.8%), high CEC (26–39 cmol/kg), and low base saturation values (from 11.2% to 17.2%), and have an adequate and singular pedological potential in relation to the ‘terroir’ or ‘terron’ concepts that meet suitability criteria. Furthermore, the information provided by this study, fundamentally through the weathering indices, supports the role of soil‐forming factors and their influence on soil properties. In addition, as these landforms and underlying materials have abundant and extensive rock fragments, the role of these soils in the context of vineyard growth and development has been investigated. Highlights There are unknown conceptual zones that support production of wine This study highlights the importance and uniqueness of vineyard soils linked to old plioquaternary surfaces. Pedogeomorphologic vineyard constraints can serve as a basis for implementing a PDO The association soils‐old surfaces can contribute to the identity and reputation of a viticultural zone

Risk Assessment and Limiting Soil Factors for Vine Production—Cu and Zn Contents in Vineyard Soils in Galicia (Rías Baixas D.O.)

“…With the addition of compost (with basic pH) to the vineyard soils for two years, the pH of these soils increased to neutral values. Different authors have indicated that the pH of vineyard soils can be from acidic (pH < 5.5) to basic soils (pH 8.5), although in terms of vine cultivation, a neutral pH is preferable [60][61][62][63][64]. In our study, the treatment with compost had a positive effect on the soils of both plots, increasing the pH and favoring the maintenance of the soil pH at neutral values, so its regular use is recommended for this slightly acidic soil.…”