Diagnostics for Soil-Plant-Microbial Redox Recovery R package HRRI version 1.0.6 Provides diagnostic functions for integrating longitudinal soil, plant and microbial observations during redox disturbance and recovery. Functions calculate stoichiometric potential oxygen demand, accessible electron capacity from explicitly supplied inventories and kinetic parameters, recovery signatures, fixed-reference domain scores, and exploratory multiblock scores with observation-coverage diagnostics. Memory is represented as a holobiont state accumulating from mineralogical, plant-acclimation and microbial-community legacies. An illustrative simulator produces closed Fe and Mn inventories alongside synthetic observations; its carbon, nitrogen, sulfur and oxygen budgets are not closed and its parameters are not calibrated to field rates. Simulation benchmarks assess agreement with a prescribed synthetic target and do not constitute empirical validation or parameter identification. Accuracy assessment is cluster-aware: intervals come from resampling whole trajectories, agreement is reported as Lin's concordance coefficient alongside correlation, and mean squared error is partitioned into bias, variance mismatch and lack of correlation. The measured quantities follow Sander, Hofstetter and Gorski (2015) <doi:10.1021/acs.est.5b00006> for mediated electrochemical determination of electron-accepting and electron-donating capacity, Kluepfel, Piepenbrock, Kappler and Sander (2014) <doi:10.1038/ngeo2084> for regeneration of electron-accepting capacity across repeated anoxic periods, Thompson, Chadwick, Rancourt and Chorover (2006) <doi:10.1016/j.gca.2005.12.005> for the increase in iron-oxide crystallinity under redox oscillation, and Keiluweit, Wanzek, Kleber, Nico and Fendorf (2017) <doi:10.1038/s41467-017-01406-6> for anaerobic microsites in otherwise aerobic soil. Agreement statistics follow Lin (1989) <doi:10.2307/2532051> and Kobayashi and Salam (2000) <doi:10.2134/agronj2000.922345x>. Software Depends: R (>= 4.3.0) Imports: ggplot2 (>= 3.4.0), graphics, grid, igraph (>= 1.5.0), rlang (>= 1.1.0), stats, utils, tidyr, tidyselect Suggests: ggtern (>= 3.4.0), knitr, patchwork (>= 1.2.0), psych, rmarkdown, testthat (>= 3.0.0), viridis Mitra Ghotbi <mitra.ghotbi@gmail.com> Comprehensive R Archive Network (CRAN) Mitra Ghotbi [aut, cre] (ORCID: <https://orcid.org/0000-0001-9185-9993>), Marjan Ghotbi [ctb] (ORCID: <https://orcid.org/0000-0003-4655-6445>) MIT + file LICENSE (https://CRAN.R-project.org/package=HRRI/LICENSE) 2026-09-23 application/tgz https://CRAN.R-project.org/package=HRRI doi:10.32614/CRAN.package.HRRI