We propose an integrated, field‑deployable concept that couples Enhanced Rock Weathering (ERW) with PMMB (Pollen‑Microbiome Media & Biofilms), waste‑calcium alkalinity sources (eggshell/calcium carbonate fines/CRC), biochar sorption layers, and an AI‑enabled Purifying Rotor mounted on agricultural vehicles. The system performs three concurrent functions: (1) accelerates inorganic carbon capture via alkalinity (HCO₃⁻/CO₃²⁻) driven by Ca–Mg release and microbially enhanced silicate dissolution; (2) increases stable soil organic carbon via PMMB‑biofilm micro‑aggregates and biochar scaffolds; (3) removes microplastics and tyre‑wear particles from service tracks through in‑motion filtration in the wheel module. A front Soil‑Sense Bar (NIR + EC + point pH) guides variable‑rate dosing of basalt:calcite and triggers rotor operating modes. A lightweight MRV protocol logs alkalinity/DIC in runoff, soil pH/Si, EC, and captured microplastics mass, producing per‑hectare tCO₂ and g‑MPs metrics. What’s new: a unified, farm‑scale architecture that merges ERW + PMMB + Ca‑waste alkalinity + biochar + in‑motion MP capture and AI‑guided variable dosing on the same vehicle, with a single MRV ledger. This is positioned as a Concept/Theoretical framework with a practical pilot plan.