The effect of annual rings' orientation on bending strength was examined on subfossil elm wood. Elm is extremely rarely found as subfossil wood, and during the last 50-60 years it has almost disappeared from natural forest stands of southeastern Europe, due to the Elm Dutch disease. The samples were cut from approximately 670 years old subfossil elm trunk retrieved from the bed of the river Sava in the area between the villages Grebnice and Domaljevac in north Bosnia. The wood was identified to the genus level based on optical microscopy analysis of three wood sections-transverse, tangential and radial. Bending strength was determined by the three-point bending test. The load was applied to the longitudinaltangential surface (LT) and to the longitudinal-radial surface (LR). The bending strength values of subfossil elm do not differ from the values of recent elm, despite the 700-year resting in anoxic river conditions. Bending strength in LT direction was slightly higher than bending strength in LR direction. The coefficient of variation and the standard deviation of the arithmetical mean were higher for LT direction. It was found that the measured bending strength for both directions follows Weibull distribution. Coefficient of determination of Weibull functions was close to 1 for both directions. The Weibull shape parameter was higher for LR direction.

Cereals were a significant part of the Roman diet, yet knowledge about their cultivation, distribution and consumption in certain regions is particularly lacking. In Europe, studies generally suggest that from the Iron Age to the Roman period there was a reduction in barley cultivation, an increase in spelt over emmer, a preference for free-threshing wheat over glume wheats, as well as the increased cultivation of rye and oats. Up till now, there was little evidence on crop cultivation in Croatia, but the discovery of around 24,000 cereal grains from the oven of a 2nd-4th c. ad Roman villa in the modern town of Osijek provides important insights into diet and subsistence in the Roman province of Pannonia. Here, the dominance of free-threshing wheat, spelt and rye with only a relatively small amount of other cereals, chaff and weeds corresponds well with this pattern seen elsewhere in Europe. The relatively clean grain deposit suggests that this sample represents processed grain ready for final food preparation and consumption at the villa. The morphological variation and overlap seen between the carbonised spelt and free-threshing wheat grains, as well as the identification of 'stunted' cereal grains, is also discussed.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Bronze Age agriculture in Europe is marked by the adoption of new crops, such as broomcorn millet (Panicum miliaceum), broad bean (Vicia faba) and gold-of-pleasure (Camelina sativa). Yet, at a regional level, it is sometimes unclear when, where and why these crops are adopted and whether they were all adopted at the same time. Croatia is one such region where archaeobotanical research is limited, making it difficult to discuss Bronze Age agriculture and diet in more detail. The discovery of a burnt-down house with crop stores at Kalnik-Igrišče provides a unique archaeobotanical assemblage and snapshot of late Bronze Age agriculture (1000-800 BC). From the carbonised plant remains discovered at Kalnik-Igrišče we see a dominance in the crops broomcorn millet, barley (Hordeum vulgare), free-threshing wheat (Triticum aestivum/durum/turgidum) and broad bean. Emmer (Triticum dicoccum), spelt (Triticum spelta), and lentil (Lens culinaris) were also found, suggesting they were probably minor crops, while spatial analysis indicates distinct crop storage areas within the building. Overall, these finds support the adoption and integration of these new crops within northern Croatia by the late Bronze Age, while highlighting implications for seasonal strategies, risk management, and cultural dietary choice.

The Iron Age site of Kaptol-Gradci belongs to the south-eastern periphery of the Hallstatt cultural complex, dominated primarily by the Kaptol cultural group, and encompasses a hillfort settlement and necropolis. During the investigation campaigns organized to date, 25 tumuli have been identified and 17 of them investigated. This paper presents the first results of the analysis of plant remains from a Hallstatt necropolis in Croatia, from tumuli 6 and 7, identified as an integral part of the complex burial ritual. In both tumuli, the predominant finds were of cereal grains (83% in tumulus 6 and 96.9% in tumulus 7). Besides the cereal grains, a very small quantity of weeds representing accidental associations have also been identified, as well as remains of wild fruits collected in the countryside. On the basis of the first results obtained from the archaeological site of Kaptol-Gradci and the scarce archaeobotanical research into Hallstatt necropolises in Europe, the conclusion can be drawn that a potential pattern can be observed, an element of a complex burial ritual in which cereal grains (overwhelmingly dominant in terms of their relative proportions) played an important role, together with various fruit deposits, whose type and quantity probably depended on the season, their availability in the environment and/or the possibility of their storage/preservation.