By Zhiyao Ma
China approved genetically modified (GM) soybean varieties for pilot cultivation in 2021 and has expanded to controlled nationwide adoption since 2024 (Sun et al. 2024; CMARA 2024). This naturally raises concerns in the United States: if China, the largest soybean importer, boosts its own production, will it cut import demand and depress world prices enough to hurt US farmers? The evidence at this stage suggests in the short run, under current land and policy constraints, China’s GM soybean adoption is not a meaningful threat to the incomes of US soybean farmers. However, over a longer horizon, structural changes in China’s rural economy could create room for both higher yields and more soybean area, with more noticeable effects on global markets.
China’s binding constraint: Land and grain self-sufficiency
Chinese policymakers are explicit that soybeans are the country’s biggest “gap” crop. Soybean area fell below 17 million acres several years ago, and after a soybean revitalization program has recovered to roughly 25.6 million acres in 2024 (National Bureau of Statistics of China 2024). Even at this historically high acreage, production remains far below domestic use, and the import deficit continues to widen. The core reason is land. At current domestic yields of roughly 1.95 tons per hectare, fully replacing China’s annual soybean imports of more than 80 million tons would require over 100 million acres of cropland. That amounts to around one-third of all arable land and would necessarily displace large areas of wheat, corn, and rice. In recent years, planted area for these staple grains has been on the approximate order of 57.8 million acres for wheat, 102.3 million acres for corn, and 73.4 million acres for rice. Given Beijing’s priority on “absolute” food-grain security and self-sufficiency in these staples, the government has made clear that substantial soybean imports are not a policy failure, but an integral part of the food security strategy. In this environment, land competition, not a lack of GM traits, is the main constraint on China’s domestic soybean production.
What GM soybeans change in the short run
Regional trial data from China’s Ministry of Agriculture and Rural Affairs (CMARA) indicate that GM soybean varieties deliver yield gains of about 5–10% relative to leading non-GM varieties, with some varieties consistently at the upper end of that range (USDA Foreign Agricultural Service 2025). These results are broadly similar to international evidence on herbicide-tolerant crops, which have 9% yield increment on average (Klümper and Qaim 2014). However, when applied to China’s current soybean footprint, the aggregate impact on production is modest. With soybean area around 10 million hectares and average yields near 2.0 tons per hectare, a 5–10% yield improvement would increase national output by roughly 1–2 million tons per year as shown in figure 1, if area remains unchanged. China’s total soybean demand is roughly 100 million tons annually when feed, crushing, and food uses are combined. Under that baseline, the yield effect of GM adoption, holding hectares constant, would substitute for only 1–2% of current China’s domestic demand.
From a global perspective, this represents a small outward shift in soybean supply. A China-specific supply increase of this size translates into a global supply shift on the order of 0.3–0.5%. Given world demand for soybeans is price inelastic in the range of −0.3 to −0.6 (USDA Economic Research Service 2004; FAPRI‑MU 2023), a shift of that magnitude would be expected to reduce the world soybean price by roughly 0.5–2.0%. That price response is real, but small relative to the volatility US producers already face from US and South American weather, currency movements, energy and biofuel markets, and China’s tariffs/bans caused by existing trade conflicts (Colussi and Langemeier 2025). Under current acreage and policy priorities in China, the yield gains from GM soybeans are therefore not large enough to pose a material short-run threat to the incomes of US soybean farmers.
How China’s yields compare internationally
One reason the yield effect alone is limited in the near term is that China remains far from the productivity frontier in soybeans. As shown in figure 2, in crop year 2024/2025, average soybean yields were about 3.41 tons per hectare in the United States, 3.62 tons per hectare in Brazil, and 2.94 tons per hectare in Argentina (USDA Foreign Agricultural Service 2025). China, by comparison, produced only about 1.95 tons per hectare. Even a 10% gain from GM adoption would leave Chinese yields well below the levels achieved in the major exporting countries. This gap underscores both the upside potential in China over the longer term and the fact that, starting from a relatively low base, early yield improvements can be absorbed domestically with limited impact on global trade flows.
Lessons from the US GM adoption path
The US experience with GM soybeans illustrates how quickly a technology can penetrate the existing area once regulatory and market conditions are in place. Commercial GM soybean varieties were introduced in the United States in 1996. By 1997, they covered about 17% of US soybean acreage, rising to around 68% by 2001 and to roughly 90–93% by 2006. Over the period from 2002 to 2022, US soybean yields increased by about 30%, and planted area increased by roughly 18%, producing significant growth in total output. For China, this experience suggests that once GM soybeans are fully approved and supply chains are organized, trait adoption on the existing soybean hectares could proceed along a similar S-shaped path. However, it does not imply that China will replicate US yield levels or area expansion. Land and climatic conditions differ, and China’s policy framework continues to prioritize wheat, corn, and rice. As a result, GM adoption in China is likely to raise yields on the current area more quickly than it enables a large expansion of that area in the near term.
Long-run projection: Demographics, land consolidation, and crop mix
The longer-run picture is more uncertain and potentially more important for US producers. China’s population structure has been characterized as a “rectangular–inverted pyramid,” with a large share of older adults and a shrinking base of young labor force, a majority of whom have migrated to urban areas (Zhang et al. 2020). In rural areas, this aging pattern and ongoing off-farm migration erode the viability of very small, labor-intensive household plots. Over a decade or more, these pressures are expected to accelerate land rental and transfer, consolidate fragmented parcels, increase mechanization, and expand the scale of commercialized operations. As farms grow, the economics of crop choice shift: higher and more stable yields in wheat, corn, and rice make it easier to meet food-grain self-sufficiency targets on somewhat less land, releasing some acreage for oilseeds such as soybeans. Larger and more mechanized farms are also better positioned to adopt GM seeds, manage input-intensive systems, and respond to evolving relative prices and policy incentives.
These structural changes interact with a second mechanism, crop rotations, when soybean profitability rises. Historically, soybeans occupy a small share of rotations in many parts of China because conventional varieties yield less than competing grains like maize and wheat. However, if GM adoption materially reduces production costs at a large scale, the relative profitability of soybeans increases. Farmers who previously allocated minimal area to soybeans—because the opportunity cost of land was too high—could respond by expanding soybean area within existing rotations. This responsiveness is likely stronger on larger and more mechanized farms where the operational and fixed costs of switching crops are lower. As a result, over a horizon of 10 years or more, China could both expand soybean area well beyond today’s roughly 10 million hectares and close part of the yield gap with the United States and Brazil.
Such a scenario would carry far greater implications for world soybean markets than a short-run, yield-only shock on today’s limited acreage. More land devoted to soybeans, combined with higher yields, would reduce China’s net import demand and effectively add exportable supply to the global balance sheet. The resulting downward pressure on international prices would be larger and more persistent, though it would emerge gradually rather than abruptly.
Implications for US farmers
For US soybean producers and allied industries, the near-term implications of China’s GM soybean adoption are limited. Yield improvements of 5–10% on roughly 10 million hectares in China translate into a modest increase in global supply and a relatively small price effect, especially when set against normal year-to-year volatility driven by weather, exchange rates, and energy markets. In the next five years, China’s land and grain-security constraints make it unlikely that GM soybeans will significantly erode US export opportunities or depress world prices beyond the range that producers already manage through standard marketing and risk-management tools.
Over a longer horizon, however, China’s demographic transition and rural land consolidation could create conditions in which more land is allocated to soybeans and GM technology helps close part of the yield gap with major exporters. In that world, China’s role in global soybean markets could evolve from a steadily growing importer to a more stable or slower-growing buyer, and the additional supply would weigh more heavily on world prices. From the perspective of US farmers, this scenario reinforces an existing strategic message rather than creating a new one: maintaining a cost and yield advantage through technology, management, and infrastructure is the best defense against gradual competitive pressure, whether it comes from South America today or China in the future.
References
Colussi, J., and M. Langemeier. 2025. “U.S.–China Soybean Deal: Comparing Past Export Levels and Global Market Impacts.” farmdoc daily (15):212. Department of Agricultural and Consumer Economics, University of Illinois at Urbana-Champaign, November 17, 2025.
Food & Agricultural Policy Research Institute (FAPRI‑MU) (University of Missouri). 2023. “Reference Prices, Farm Income and Agricultural Land Markets.” FAPRI-MU Report #06-23. Columbia, MO, October.
Klümper, W., and M. Qaim. 2014. “A Meta-Analysis of the Impacts of Genetically Modified Crops.” PLoS ONE 9(11):e111629.
China’s Ministry of Agriculture and Rural Affairs (CMARA). 2024. “List of Approved Agricultural GMO Biosafety Certificates, 2020–2024.” Accessed November 26, 2025. https://www.moa.gov.cn/ztzl/zjyqwgz/spxx/
National Bureau of Statistics of China. 2024. “National Grain Production and Sown Area Statistics for 2024.” (in Chinese). December 13. https://www.stats.gov.cn/sj/sjjd/202412/t20241213_1957743.html
Sun, M., S. Li, W. Yang, B. Zhao, Y. Wang, and X. Liu. 2024. “Commercial Genetically Modified Corn and Soybean are Poised Following Pilot Planting in China.” Molecular Plant 17.4 (2024): 519-521. https://doi.org/10.1016/j.molp.2024.03.005
USDA Economic Research Service. 2004. “How Does Structural Change in the Global Soybean Market Affect the US Price?” OCS Report 50165 (OCS04D01).
USDA Foreign Agricultural Service. 2025. “New Genetically Modified Corn and Soybean Variety Registration List Published.” GAIN Report CH2025-0075, Beijing, China, April. https://apps.fas.usda.gov/newgainapi/api/Report/
Suggested citation
Ma, Z. 2026. "How Will China's Genetically Modified Soybean Adoption Impact the Soybean Market?" Agricultural Policy Review, Winter 2026. Center for Agricultural and Rural Development, Iowa State University. https://agpolicyreview.card.iastate.edu/winter-2026/how-will-china-genetically-modified-soybean-adoption-impact-market