WASHINGTON - March 8, 2026. A second week of U.S. military strikes on Iran is sending shockwaves through global agricultural markets, pushing fertilizer prices higher and raising concerns among U.S. farmers preparing for spring planting. The disruptions, driven by halted shipping traffic in the Strait of Hormuz and mounting geopolitical tension, could increase input costs, pressure crop yields, and intensify policy debates in Washington at a critical moment for the farm economy.

The conflict matters deeply for agriculture because nearly one-third of the world's fertilizer supply moves through the Strait of Hormuz, a key maritime corridor linking the Persian Gulf to global markets. Vessel traffic in the region has stalled as insurers cancel cargo coverage and shipping companies reroute or suspend deliveries. The bottleneck is already lifting prices for nitrogen, urea and phosphate nutrients that American growers rely on for corn, soybean and wheat production.

Industry groups warn that the timing could not be worse. North American farmers are only weeks away from spring planting, and fertilizer availability is essential for maintaining yields and stabilizing commodity supplies.

"From urea to phosphates, global supply disruptions are already creating pressure on availability and prices," the Fertilizer Institute said, underscoring the growing concern across the agricultural supply chain.

For U.S. producers already grappling with tight margins, the surge in input costs could reshape planting decisions. High fertilizer prices were already a major complaint among financially stressed crop growers, and further increases could lead farmers to reduce fertilizer applications or shift acreage away from nutrient-intensive crops. Analysts warn that lower fertilizer use could translate into weaker yields later in the season.

Such outcomes would have implications well beyond U.S. farms. Reduced crop output in major producing regions could push global food prices higher, reviving inflation concerns across agricultural markets and food supply chains.

The geopolitical turmoil is expected to dominate discussion this week on Capitol Hill. American Farm Bureau Federation President Zippy Duvall and other agriculture leaders will testify before the Senate Agriculture Committee, which is holding its first hearing of the year focused on increasing domestic consumption of U.S.-grown agricultural products.

The hearing, led by Chairman Sen. John Boozman of Arkansas, comes at a pivotal moment for farm policy. Lawmakers and industry stakeholders are watching closely for signals on how the Senate plans to move forward with its version of the next farm bill, particularly after the House Agriculture Committee advanced legislation last week.

Adding another layer of uncertainty, the U.S. Department of Agriculture will release its monthly World Agricultural Supply and Demand Estimates (WASDE) just hours before the Senate hearing. While analysts had not expected major changes to crop projections, the Middle East conflict has raised questions about whether USDA will factor potential fertilizer shortages and shipping disruptions into its outlook for commodity prices and yields.

Energy markets are also influencing agricultural policy discussions. Rising gasoline prices tied to the Iran conflict are intensifying pressure in Washington to expand year-round sales of E15, a higher-ethanol gasoline blend derived largely from corn. Biofuel groups argue the renewable fuel could strengthen national energy security while supporting U.S. grain demand.

Market data already reflect the widening gap between energy fuels. Gasoline futures have surged roughly 50% this year, compared with a 13% increase for ethanol, according to analysts, strengthening the argument for expanded ethanol blending.

Meanwhile, the Environmental Protection Agency is expected to release long-delayed renewable volume obligations (RVOs) for biofuel blending in the coming weeks. Industry analysts anticipate robust mandates for biomass-based diesel, which would increase demand for agricultural feedstocks such as soybean oil and waste fats used in renewable fuel production.

Trade policy could add further volatility. Treasury officials have signaled the administration may increase the current 10% global tariff to 15%, a move that could affect agricultural supply chains and negotiations with major trading partners.

Beyond global tensions, lawmakers are also scrutinizing domestic policies affecting agriculture markets. The Senate Agriculture Committee is expected to examine import waivers allowing foreign products in U.S. school meal programs, a policy some farm groups argue undermines demand for domestic producers.

At the same time, another Senate panel will consider legislation addressing diesel engine shutdowns during extreme cold weather, an issue that has affected farm equipment and rural transportation systems.

Taken together, the developments highlight the fragile intersection of geopolitics, energy markets and agricultural policy. For U.S. farmers heading into planting season, the biggest concern remains fertilizer availability and cost, factors that will ultimately shape acreage decisions, crop yields and the outlook for global food supplies in 2026.