The situation in Iran has disrupted freight routes in the Persian Gulf, bringing global fertilizer transportation to a standstill and drawing renewed attention to Liebig's classic law of minimum nutrient content. Originally used to guide agricultural planting, this scientific theory can now not only accurately predict the global shortage of agricultural inputs but also be extended to modern industrial systems.

The sharp decline in oil and gas supply has directly cut off the source of fertilizer and basic industrial product production. The insufficient supply of a single factor has begun to restrict the production capacity of the entire industrial chain at every level. Global agricultural production and the development of the real economy are facing a hard resource bottleneck.

Classic agricultural laws reveal the core logic of resource shortages

Justus von Liebig, a renowned 19th-century chemist, proposed the theory of mineral nutrition in plants and popularized the law of minimum. This theory clearly states that the upper limit of crop growth is determined by the minimum amount of essential nutrients; even with sufficient supplementation of other nutrients, the growth limitations caused by nutrient scarcity cannot be compensated for.

At this crucial stage of agricultural preparation, this theory is beginning to show its real-world impact globally. The Persian Gulf, as a core global fertilizer production region, accounts for a significant share of the global supply of urea, anhydrous ammonia, and various phosphate fertilizers. The current disruption to regional distribution has directly led to a substantial tightening of global fertilizer supplies.

Fertilizer supply chain disruptions have plunged agricultural production into crisis in many countries.

Nitrogen, phosphorus, and potassium are essential nutrients for crop growth. Most crops cannot synthesize them on their own and must rely on external fertilization. Only a few legumes can fix nitrogen on their own. Currently, the export of the two major nitrogen fertilizer raw materials from the Persian Gulf is hindered, coupled with the interruption of 20% of global liquefied natural gas exports. Countries like India, which rely on imported natural gas to produce nitrogen fertilizer, are also facing limited domestic fertilizer production capacity, further exacerbating the pressure on the agricultural input market.

Soaring fertilizer prices have prompted farmers worldwide to adjust their planting plans. Argentine wheat farmers have voluntarily reduced nitrogen fertilizer use, forcing them to accept reduced yields; Egyptian farmers have reduced their wheat acreage and switched to low-fertilizer-required crops. Data from a US agricultural agency shows that 70% of farmers in the US are unable to obtain all the necessary fertilizers for their crops, putting pressure on both the scale of agricultural production and the quality of harvests.

Rising energy prices and increasing agricultural production costs

Modern agriculture relies heavily on mechanized operations, making diesel fuel an essential commodity for agricultural production.

This year, after US farmers finalized their planting plans, diesel prices surged, directly squeezing agricultural profits. If high energy prices persist, farmers will proactively reduce their planting scale and switch to lower-cost crop varieties, making diesel a crucial limiting factor in agricultural production, on par with fertilizers. The rise in prices of a single energy source has already begun to reshape the global agricultural landscape.

The law extends to the entire industrial chain, bringing supply constraints.

Energy scholar Vaclav Smil proposed that cement, steel, plastic products, and ammonia are the four core materials that sustain modern society, with ammonia being the core raw material for producing agricultural fertilizers. The large-scale production of these four basic industrial products is highly dependent on fossil fuels.

With the sharp decline in the export of oil and natural gas from the Persian Gulf, not only is the production of agricultural inputs restricted, but the production capacity of various industrial products that rely on oil and gas and their derivatives will also be significantly constrained. This perfectly aligns with the operating logic of the law of minimum nutrient availability, where a shortage of a single basic resource will hinder the normal operation of the entire industrial chain.

Market perception has shifted, and resource scarcity has become the long-term norm.

For a long time, the global market has generally believed that shortages of various basic energy sources and resources are only short-term and temporary problems, and that the supply-demand imbalance will soon be corrected on its own. However, the current situation has completely shattered this perception. Art Berman, a senior consultant in the oil industry, said that the high levels of global crude oil production before the outbreak of the Iranian situation are unlikely to be repeated in the future.

This also means that the previous development model of abundant resources and unlimited capacity expansion is unsustainable. Global restrictions on the production of various core basic raw materials will become the norm, and all industries must face up to the development constraints brought about by insufficient resource supply.

Summarize

Overall, the disruption of energy and agricultural supplies from the Persian Gulf has extended the law of minimum nutrient requirements, originally applied to agriculture, to the global real economy. From fertilizers and fuels needed for planting to essential raw materials for industrial development, the shortage of a single core resource has created a chain reaction of constraints, leading to a continued increase in the risk of reduced agricultural production and declining industrial output. The global market must abandon the mindset of unlimited supply, proactively adapt to the new market landscape of tightening resources, and prepare in advance for various economic changes brought about by supply chain shortages.