; (D) standards for data collection and dissemination; (E) farmer data management and privacy; (F) greenhouse gas emissions and soil health inventories and databases, as described in subsection (h); and (G) criteria for soil health and greenhouse gas emissions reductions incentives, as described in subsection (i). (g) Measurement system (1) Purpose The Secretary shall evaluate existing outcomes-based measurement systems for recordkeeping, modeling, and measurement of farm-level greenhouse gas emissions and soil carbon sequestration, including measures of soil disturbance, plant diversity, continual living cover, residue management, advanced grazing management, and crop-livestock integration, to determine which of those systems— (A) can be implemented quickly; (B) can improve in accuracy and ease over time; (C) use the best available science and technology; (D) estimate uncertainty; and (E) are cost-effective. (2) Guidance Not later than 18 months after the date of enactment of this subsection, the Secretary shall issue guidance on the outcomes-based measurement systems evaluated under paragraph (1), based on— (A) recommendations from the advisory committee established under subsection (f); and (B) information from— (i) existing and emerging agroecosystem models; (ii) remote sensing data and analysis; (iii) soil health demonstration trials carried out under section 1240H(c)(7); (iv) existing and emerging public environmental services protocols, measurement systems, and benchmarks, including uncertainty predictions and measurements; (v) field-level measurement, including field-based data collected under section 21002(a)(2) of Public Law 117–169 ( 7 U.S.C. 6936 note; 136 Stat. 2018); (vi) the Conservation Evaluation and Monitoring Activity for the Carbon Sequestration and Greenhouse Gas Mitigation Assessment