This dataset contains raw trial data from the 2023/24 GRDC Hyper Yielding Crops (HYC) project, which aims to improve productivity and profitability in high-yielding cropping regions across southern Australia. Trials were conducted across five states—WA, SA, VIC, TAS, and NSW—focusing on wheat, barley, and canola. The dataset covers: barley trials in SA, TAS, VIC, and WA; canola trials in NSW, SA, VIC, and WA; and wheat trials in all five states. Data are organised by crop type, site, and trial ID, with corresponding trial details and analysis provided in the included PDF results report. Each Excel file captures original data and related calculations (e.g., plant density from counts), with consistent formatting across trials. Assessments were conducted using GDM ARM trial management software, and each sheet includes a key describing units, codes, and abbreviations. The accompanying report outlines the experimental design, treatment summaries, and environmental factors (e.g., soil and climate) relevant to data interpretation. The dataset is self-describing, with metadata such as crop growth stage, assessment dates, and explanatory notes embedded in the spreadsheet headers. This research was made possible by the support of GRDC, collaborating growers, and delivery partners including FAR Australia, CSIRO, DPIRD (WA), Brill Ag, SFS, Techcrop, CeRDI, MFMG, Riverine Plains Inc., and Stirling to Coast Farmers.