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Consider the Risks When Taking a Residual Fertility Deduction

By Kristine Tidgren and Tiffany Dowell Lashmet

Consider the Risks When Taking a Residual Fertility Deduction

There’s been much recent discussion about a “residual fertility” deduction for farm and ranchland. It’s been common practice among farmers for many years to take a tax deduction for the value of unexhausted fertilizer remaining in soil purchased with land. In recent years, however, this practice has expanded to include large deductions for the value of all soil nutrients, not necessarily those linked to prior fertilization. Questions about the legal basis for these deductions have increased as the value of these deductions have risen. 

Fertilizer Expenditures and Section 180

To understand this issue, it is important to understand the basis for deducting fertilizer in the first place. Years ago, the IRS required farmers to capitalize and deduct fertilizer costs over the useful life of the fertilizer. Because the fertilizer would not be used up in one year, the deductions had to be spread out. In 1960, Congress changed course, recognizing that farmers would benefit from deducting fertilizer expenses in the year paid. Section 180 thus allows farmers to elect to deduct in the year of application the cost of fertilizer, lime, and similar materials applied to land used in farming.

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Kansas Wheat Harvest 2026 | Three John Deere S7 700 Combines in Action

Video: Kansas Wheat Harvest 2026 | Three John Deere S7 700 Combines in Action

Kansas Wheat Harvest 2026 is underway near Alden, Kansas!

In this video, I spend time with Frederick Harvesting, a custom harvesting operation based in Alden, Kansas. Back at their home farm, three new John Deere S7 700 combines equipped with John Deere HDF40 draper heads work through a drought-stricken winter wheat crop while one of the farm's John Deere 8R 370 tractors pulls a Brent 1398 grain cart.

Most of the Frederick Harvesting crew was already busy cutting wheat in southwest Kansas, but these machines remained at home to finish up local fields. Throughout the video, I explain what is happening, discuss the effects of dry conditions on the crop, and capture plenty of aerial footage showing the combines working with the grain elevator at Alden in the background.