Ried Bromberg stretches from Unterstockstall along the Wagram scarp towards Kirchberg, and from Hippersdorf towards Königsbrunn. The vineyards lie at an elevation of 180 to 230 metres. On the scarp, they are terraced and face south or south-west, on the plateau, however, they are flat. The very bottom of the substratum contains mostly calcareous sands, sometimes cemented into sandstones, or clay and silt from the former sea that existed here around 17 million years ago. These have been covered by lime-deficient to non-calcareous sandy gravels, indicating a former valley floor of the ancient Danube, and these are also found, covered by loess and black earth, in the substratum of the plateau. Loess is a calcareous rock dust (silt) that was blown here from the Alpine region during the cold phases of the Ice Age, at a time when vegetation was sparse. Today, it forms a loamy, sandy soil that is invariably calcareous, with a well-balanced chemical and mineralogical composition and a good capacity for storing water. The vineyards are recorded in both the Franziszeische Kataster (Austrian cadastral survey) from 1823 and the Administrativkarte (administrative map, 1864–1881).
Source: ÖWM, BFW-eBOD Digitale Bodenkarte, Riedenatlas Wagram 2021, M. Heinrich et al. 2009, GBA 2015: Blatt 39 Tulln, NÖ Atlas-Land Niederösterreich, www.familia-austria.at