For more information on who must use an accrual method of accounting, see Accrual Method Required under Accounting Methods in chapter 2. taxmap/pubs/p225-013.htm#en_us_publink1000217914Fertilizer and Lime(p21) Fertilizer and Lime You can deduct in the year paid or incurred the cost of fertilizer, lime, and other materials applied to farmland to enrich, neutralize, or condition it if the benefits l