; (iii) the use of rotational grazing on pasture for livestock; (iv) the use of anaerobic digesters to process organic material; (v) the use of buffer crops to reduce soil erosion; and (vi) other practices that can yield significant reductions in the emission of carbon dioxide, methane, and other greenhouse gases by producers of agricultural commodities and their food products. (b) Definitions For purposes of this section: (1) Greenhouse gas The term greenhouse gas has the meaning given such term under section 211(o)(1)(G) of the Clean Air Act, as in effect on the date of the enactment of the Food and Farm Act . (2) United States The term United States has the meaning given such term under section 5911(a)(4) of title 5, United States Code, as in effect on the date of the enactment of the Food and Farm Act . 252. Authorization of appropriations There are authorized to be appropriated to carry out this subtitle such sums as may be necessary for each of fiscal years 2019 through 2023. G Administration and Funding 261. Commodity credit corporation (a) In general Section 1241(a) of the Food Security Act of 1985 ( 16 U.S.C. 3841(a) ) is amended to read as follows: (a) Annual funding For each of fiscal years 2019 through 2023, the Secretary shall use the funds, facilities, and authorities of the Commodity Credit Corporation to carry out the following programs under this title (including the provision of technical assistance): (1) The conservation reserve program under subchapter B of chapter 1 of subtitle D, including, to the maximum extent practicable— (A) $20,000,000 for the period of fiscal years 2019 through 2023 to provide payments under section 1234(c)