USDA-NASS’ June 30 Acreage Report is expected to update supply expectations, and analysts think weather uncertainties held producers back from indicating optimistic planting intentions in March
The much-anticipated June 30 Acreage Report has the potential to shift commodities positively or negatively given the current conditions of grain markets. Looking back at 2019 and 2020, those weren’t easy crop years. In 2019, heavy rains and excessive moisture led to a record 20 million-plus acres of prevent plant insurance claims. In 2020, uncertainty amidst COVID-19 precautions created widespread price volatility across the food supply chain. As impacts from those two years play out, commodity prices have rebounded, fueled by global demand that has pushed ending stocks lower for both corn and soybeans.
Speculation about shifting production from soybeans to corn and vice versa, corn to soybeans, has fueled market trade since the March Prospective Plantings report. In this article, we analyze the impact of both shifting scenarios. Both scenarios imply that farmers will maintain the current estimate of 178.7 million acres of corn and soybeans combined. The February Agriculture Outlook Forum estimated farmers would plant a combined 182 million acres of corn and soybeans.
Scenario 1: Corn Acres Shift to Soybean Acres
Given the June World Agricultural Supply and Demand Estimates for the 2021/22 marketing year, the corn price is projected to be $5.70 per bushel, up 31% from the 2020/21 marketing year corn price of $4.35 per bushel. The incentive to earn an extra $1.35 per bushel in this year’s market could push farmers to plant more corn. If farmers were to plant 3% more corn acres, it would increase corn planted acres from 91.1 million acres to 93.8 million acres. Early in this year’s growing season, USDA estimated that farmers will harvest 91% of corn acres. In this scenario, 86 million acres of corn would be harvested. At 179.5 bushels per acre, the current USDA yield estimate for the year, production would be on track to reach close to 15.5 billion bushels of corn, the most on record since 15.1 billion bushels were produced in 2016, and up from current estimates of just under 15 billion bushels. At current demand projections of 5.7 billion bushels going to feed and residual, 5.2 billion bushels to ethanol, another 1.4 billion bushels to food, seed and industrial use and 2.45 billion bushels of corn exports, this increase in corn production would push ending stocks up to 1.8 billion bushels, 33% higher than current estimates of 1.3 billion bushels. The stocks-to-use ratio would move from 9.2%, which is USDA’s current estimate, to 12.2% in this scenario, potentially relieving any upward pressure currently placed on corn prices. When the corn stocks-to-use ratio was last 12.2%, in 2014, corn prices were $3.70 per bushel.
In this same scenario, the 3% of corn acres would be gained from a 3% decrease in soybean acres. If farmers were to plant 3% fewer soybean acres, soybean acres would decrease from the current estimate of 87.6 million acres to just under 85 million acres. USDA currently estimates that farmers will harvest 99% of the planted soybean acres, thus, in this scenario, farmers would harvest 84.1 million acres. At 50.8 bushels per acre, soybean production would decrease from 4.4 billion bushels to just under 4.3 billion bushels, close to 2016 production levels. Current USDA estimates for soybean demand have crushing at 2.2 billion bushels, seed at 104 million bushels, residual at 15 million bushels and exports at 2.075 billion bushels. The decrease in the production of soybeans for this scenario would push ending stocks to 22 million bushels, down from the 155 million bushels currently estimated. The stocks-to-use ratio of soybeans would also drop 3%, going from the 3.5% currently projected to 0.5%, the lowest on record. The last time the stocks-to-use ratio for soybeans was under 3%, in 2013, soybean prices were $13.00 per bushel.
Figure 1 displays corn stocks-to-use ratios with prices from the latest WASDE comparing the scenarios of an increase or decrease to corn planted acres.

Scenario 2: Soybean Acres Shift to Corn Acres
The current marketing year estimate for 2021/22 soybean prices is $13.85 per bushel, up 23% from $11.25 per bushel in the current 2020/21 marketing year. This implies an incentive of $2.60 per bushel increase to plant soybeans. Keep in mind, soybean yields tend to be less than a third of the size of corn yields. If farmers were to plant 3% more soybean acres, it would increase soybean planted acres from 87.6 million acres to 90.2 million acres, which is about where USDA estimated soybean planted acres to be in February. With a harvest rate of 99% of planted acres, this scenario would imply farmers harvest 89 million acres of soybeans. Current soybean yield estimates of 50.8 bushels per acre would push production estimates to 4.5 billion-plus bushels of soybeans, the most since 2017, when soybean production peaked at 4.4 billion bushels. At current soybean demand projections indicated above, the increase in soybean production would push ending stocks up to 286 million bushels, 84% above current estimates of 155 million bushels. The stocks-to-use ratio would increase 3%, as well, from 3.5% to 6.5%. This stocks-to-use ratio is similar to the ratio in 2007, when prices were $10.15 per bushel.
The increase in soybean acres would pull acreage away from corn acres. A 3% decrease in corn acres would decrease the current estimate of 91.1 million acres to just above 88 million acres. USDA currently estimates that farmers will harvest 91% of corn acres at a rate of 179.5 bushels per acre. A drop in acreage like in this scenario would decrease corn production from 14.9 billion bushels to 14.5 billion bushels, relatively close to 2017 levels, when corn production was 14.6 billion bushels. At current USDA demand estimates for corn indicated above, this scenario of decreasing corn acres would push ending stocks lower, from 1.3 billion bushels currently estimated to 906 million bushels, the lowest since 2012, when corn ending stocks were 821 million bushels. The corn stocks-to-use ratio for this scenario would drop 3%, from 9.2% to 6.1%. The last time the stocks-to-use ratio was close to 6% was in 1995, when corn prices were $3.24 per bushel.
Figure 2 displays soybean stocks-to-use ratios with prices from the latest WASDE comparing the scenarios of an increase or decrease to soybean planted acres.

Take Away
Farmers have been closely watching market trends since intended planted acres were first reported in the March Prospective Planting report. Corn and soybean futures prices have risen 23% and 16%, respectively, compared to USDA’s estimates for the 2020/21 marketing year. The incentive to plant either commodity is strong and more than likely we will see farmers increase acreage for both commodities. Given that USDA first estimated farmers would plant 182 million acres of corn and soybeans combined, clearly, there is room to grow. However, the largest limiting factor in commodity production is the weather. Diverging weather patterns with drought in the West and moving East and heavy rains in the South and along the Mississippi Delta region could cause a hiccup to the scenario of maximizing all corn and soybean acreage. Big news is to come on June 30, so we shall wait and see what farmers ended up doing.