Montmorillonite content is an influential soil parameter of grapevine development and yield in South Uruguay

Soil physical and chemical characteristics play a key role on vine growth yield. The soils of South Uruguay display high content montmorillonite or illite. proportion these minerals deserves special attention as they influence the soil structure its hydrological properties. present study was conducted in 1.1 ha vineyard this region (Canelones), characterized by heterogeneity plant vigour. It aimed to determine map properties their relations with vigour cation exchange capacity (CEC) clay organic matter contents were measured 84 locations within calculate illite soil. In addition, type abundance clays corroborated X-ray diffractometry analysis. CEC positively correlated vigour, expressed Normalized Vegetation Index (NDVI), trunk diameter, pruning weight, leaf area, Thus, distribution ratio montmorillonite/illite conditioned yield at field level. impact those water mineral supply is discussed.