October 19, 2020

Fertilizer Prices Again Turn Lower

By David Widmar

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While the headline “fertilizer prices turn lower” has become familiar in recent years, it’s important to dig into the details and subtleties. This week’s post reviews the latest prices, trends, and farm-level implications.

Lower Fertilizer Prices

The USDA reports average farm-level fertilizer prices for the state of Illinois. This is an incredibly valuable dataset that spans back several years, which allows for helpful context.

Overall, fertilizer prices have turned lower in recent weeks, which is significant because Spring prices were already low. Figure 1 shows current fertilizer prices (average of September and October) compared to last Spring (the average of April and May). Anhydrous ammonia prices have contracted the most, down 14%, while other nitrogen sources – urea and 28% liquid – are down roughly 9%. Also, lower is potash, down nearly 9%. The only fertilizer that has turned higher is DAP, which is 4% higher.

Figure 2 shows a longer-run price trend for anhydrous ammonia, DAP, and potash. Overall, fertilizer prices peaked between 2012 and 2014, before trending lower. Current prices are near their lowest levels in a decade. For example, while current DAP prices are 4% above Spring 2020 prices, the uptick is from 10-year lows.

2020 fertilizer prices
Figure 1. Change in Reported Illinois Fertilizer Prices, Sept.-Oct. 2020 compared to April-May 2020. Data Source: USDA AMS.

2020 fertilizer prices
Figure 2. Select Reported Illinois Fertilizer Prices, Anhydrous Ammonia, DAP, Potash. Jan. 2010- Oct. 2020. Data Source: USDA AMS.

Farm-Level Implications

For most producers, the per-acre expense of fertilizer is the most relevant metric. Figure 3 shows the estimated expense for a corn fertilizer rate of 180-70-70. This Spring, the expense – using anhydrous ammonia – was an estimated $99 per acre. This was down from $120 in the Spring of 2019 and the lowest levels since 2010.

Current prices push the expense down to $92 per acre and set the stage for another potential year of lower fertilizer expense in 2021. A lower fertilizer expense for corn would help offset some of the advantage soybeans gain from a favorable soybean/corn price ratio.

lower fertilzier expense
Figure 3. Estimated Corn Fertilizer Expense of a 180-70-70 Application of Fertilizer at Spring Prices (2010-2020) and Fall 2020 Prices. Data Source: USDA AMS and aei.ag Calculations.


Beyond the top-line story, producers should carefully consider the price relationship among alternative nitrogen sources. The sharp price decline of anhydrous ammonia has created notable pricing relationships.

Figure 4 shows the relative price per unit of nitrogen from urea and anhydrous ammonia (urea/nh3). On average, a unit of nitrogen from urea fertilizer costs 1.23 times the cost from anhydrous ammonia. Over the last 18 months, however, this price relationship has been well above average. In recent weeks, the urea/nh3 price ratio has averaged 1.46, which means the urea’s nitrogen unit price is considerably higher than from anhydrous ammonia.

While the price ratios can move considerably, there two points to consider. First, urea prices are at historically high levels relative to anhydrous ammonia. Only a few times in the past decade has the ratio approached 1.50. Second, the urea/nh3 price ratio has spent most of the last three years above the long-term average.

Figure 5 shows the relative price ratio for liquid 28% and anhydrous ammonia. The average price ratio is 1.36 and has recently jumped to 1.48. The current levels are not approaching historic highs above average, and this ratio has exceeded 1.60 twice since 2017.

Producers who can consider alternative nitrogen fertilizer sources should carefully consider the relative prices as they prepare for 2021. Finally, keep in mind relative prices that can adjust from a combination of factors. For example, the urea/nh3 ratio can revert toward the average from a combination of lower urea or higher anhydrous ammonia prices.

anhydrous ammonia and urea prices
Figure 4. Relative Unit Nitrogen Prices, Urea/NH3, Jan. 2010 – Oct. 2020. Series Average (in black): 1.23. Data Source: USDA AMS & aei.ag Calculations.

anhydrous ammonia and liquid 28% prices
Figure 5. Relative Unit Nitrogen Prices, 28%/NH3. Jan. 2010 – Oct. 2020. Series Average (in black): 1.36. Data Source: USDA AMS & aei.ag Calculations.

Farm Diesel

Finally, another data series reported from the Illinois data is farm diesel fuel prices (Figure 6). Throughout 2019, the price of farm diesel was mostly $2.50 per gallon. Prices dropped significantly in early 2020, and prices over the last eight weeks have averaged 1.65 per gallon. Other than a brief dip to $1.50 per gallon in early 2016, farm diesel prices have not been lower over the past decade. Further to that point, prices are well below the $3.50 level common from 2011- 2014.

farm diesel prices 2020
Figure 6. Illinois Farm Diesel Fuel Prices, Jan. 2010- Oct. 2020. Data Source: USDA AMS.


Wrapping it Up

As producers begin to plan and prepare for 2021, another year of lower fertilizer and diesel prices seem possible. While a lot can happen over the winter months, the current reality is that prices are near the ten-year lows. Current fertilizer prices translate into a fertilizer expense below the Spring 2020 level, which were already the lowest in a decade.

Not only are fertilizer prices low, but they are also significantly below the highs of just 5 to 10 years ago. For example, the example fertilizer expense exceeded $140 per acre for five straight years.

Finally, producers should consider the price of alternative fertilizers when feasible. For example, anhydrous ammonia prices are considerably lower than urea and liquid 28% on a relative basis. Even in an overall favorable market, opportunities could still exist.

The AEI Premium version of this article – which includes insights about where prices may be heading – can be found here.

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