not more than $25,000,000. (2) Cash rent The term cash rent means any rent paid for the use of land in cash or as a crop share that is guaranteed as to the dollar amount of the commodity paid in rent. (3) Crop share rent The term crop share rent means any rent paid for the use of land as a crop share and that is not described in paragraph (2). (4) Years of election The taxpayer may elect the application of this section only for 3 taxable years of the first 5 taxable years for which ordinary and necessary expenses paid or incurred in carrying on such trade or business are allowable as a deduction by the taxpayer under section 162. (5) Controlled groups and common control All persons treated as a single employer under subsections (a) and (b) of section 52 shall be treated as 1 person. . (b) Part of general business credit Section 38(b) of such Code is amended by striking plus at the end of paragraph (32), by striking the period at the end of paragraph (33) and inserting , plus , and by adding at the end the following new paragraph: (34) the hemp farmer start-up credit determined under section 45U(a). . (c) Clerical amendment The table of sections for subpart D of part IV of subchapter A of chapter 1 is amended by adding at the end the following new item: Sec. 45U. Hemp farmer start-up credit. . (d) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2020. 5. Small hemp farmer investment credit (a) In general Subpart E of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by inserting after section 48C the following new section: 48D. Small hemp farmer credit (a) In general For purposes of section 46, in the case of an eligible hemp farmer, the small hemp farmer credit for any taxable year is an amount equal to 30 percent of the basis of hemp farming property placed in service during the taxable year. (b) Eligible hemp farmer For purposes of this section, the term eligible hemp farmer means any person who— (1) engaged in the