Data From: Stability Of Hop Yield And Quality Factors In Response To Delivery Of Irrigation And Harvest Timing

This dataset supports field trials into the effects of irrigation configuration and harvest timing on yield, cone chemistry, and disease incidence in hop (Humulus lupulus L.) production systems. The dataset contains 113 observations collected across four growing seasons (2020–2023) from a replicated field experiment evaluating two irrigation configurations (1 vs. 2 drip tubes per row) and two harvest timings (EARLY and LATE). The experimental design followed a blocked structure with up to seven field blocks per year, enabling assessment of treatment effects across spatial replications and seasons. Each observation corresponds to a plot-level measurement and includes agronomic, pathological, and phytochemical variables. Agronomic metrics include fresh yield (kg/plant), dry yield (kg/plant), dry matter (%), cone color (1–10 scale), and hop storage index (HSI). Brewing-relevant quality parameters include alpha acids (%), beta acids (%), and total oil content (mL/100 g). Plant health variables include incidence or severity ratings for hop-associated pathogens and viroids (Hop stunt viroid (HSVd), Apple mosaic virus (ApMV), American hop latent virus (AHLV), Hop latent viroid (HLV), and Hop mosaic virus (HMV)), recorded as plot-level measures. These data enable examination of potential interactions between irrigation regime, harvest timing, and pathogen pressure. A major component of the dataset consists of detailed volatile and terpene profiles (mg/kg), quantified for individual compounds commonly associated with hop aroma and brewing quality. Measured compounds include monoterpenes (e.g., α-pinene, β-pinene, myrcene, limonene), oxygenated monoterpenes (e.g., linalool, geraniol, nerol, terpinen-4-ol), esters (e.g., methyl geranate, geranyl acetate, geranyl isobutyrate), and sesquiterpenes and their oxides (e.g., α-humulene, β-caryophyllene, caryophyllene oxide, humulene epoxides I and II).
Organization: Department of Agriculture
Organization URL: https://catalog.data.gov/organization/usda
Last updated: 2026-03-16
Tags: Humulus lupulus L., cone yield, irrigation configuration, virus incidence