Abstract
Regional identity is a well-established concept of economic interest that has been identified as a source of unique quality traits of various agricultural products originating from a specific region. In the context of hops, the exploration of regional identity is still at a very early stage despite an increasing global demand for specialized aroma hops to enable more product diversity, especially in the growing craft beer industry. Thus, we conducted a large-scale investigation characterizing the growing environments of Cascade and Mosaic® hops at 39 field locations throughout two important valleys in the Pacific Northwest region of the United States to identify factors that significantly impact hop characteristics and to better understand how these impact hop regional identity. The Willamette Valley (Oregon) and the Yakima Valley (Washington) have distinctly different soil characteristics, soil chemistry, and climate. In turn, growers in these two regions apply unique agronomic practices in response to these differences. This investigation also revealed significant subregional differences in growing environment within each of these two valleys. Multivariate statistics, correlation, and regression analysis identified a number of environmental and agronomic factors like soil pH, the concentration of zinc, sulfur, and manganese in the soil, and the amount of applied zinc fertilization, which exhibited strong positive or negative correlations with specific hop quality traits depending on the hop variety, primarily in Oregon. This study provides new insights into understanding hop regional identity and represents an important step towards fully utilizing this effect. © 2023 Society of Chemical Industry.
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