The Fertiliser Crisis, By Bob Farmer (Dairy Farmer)

There is something almost perversely scary about fertiliser becoming the next pressure point. Energy shocks we understand instinctively — cars stop, lights dim, industries slow. But fertiliser sits one layer deeper, upstream of the visible economy, embedded in soil chemistry and seasonal cycles. When it tightens, nothing dramatic happens at first. Crops are still planted. Fields still look green. The crisis, like a delayed fuse, burns quietly beneath the surface.

Yet fertiliser is not a niche input. It is the metabolic engine of modern agriculture. Nitrogen, phosphorus, potassium — these are not optional enhancements; they are what allow yields to reach the levels required to sustain both domestic consumption and export markets. Remove or constrain them, and you are not trimming efficiency — you are reducing output.

The vulnerability begins with chemistry and ends with geopolitics. Nitrogen fertilisers are produced using ammonia, and ammonia is, in turn, an energy product — most commonly derived from natural gas through the Haber–Bosch process. When gas prices spike, fertiliser costs follow with ruthless fidelity. Add to this the concentration of global supply — Russia, the Middle East, parts of Asia — and the system begins to look less like a market and more like a network of chokepoints.

Australia's position is, again, paradoxical. A major agricultural exporter, yet heavily reliant on imported fertiliser or imported inputs for domestic production. The country exports raw energy and minerals, but imports the refined, value-added products that make those resources agriculturally useful. It is a structural asymmetry that works in times of stability and begins to creak under stress.

What happens when fertiliser becomes scarce or prohibitively expensive? The first response is not collapse, but compromise. Farmers adjust application rates downward. Marginal land is left fallow. Crop choices shift toward less input-intensive varieties. These are rational adaptations, but they come at a cost: lower yields.

And here the time lag becomes dangerous. Unlike energy shortages, which are felt immediately, fertiliser shortages manifest months later at harvest. By the time reduced yields are visible, the decisions that caused them are already locked in. There is no mid-season correction. Agriculture runs on biological time, not policy cycles.

The consequences cascade. Lower yields mean tighter domestic supply and reduced export volumes. Prices rise, not necessarily in a dramatic spike, but in a grinding, persistent way. Food inflation, already politically sensitive, becomes harder to contain. Governments face an unenviable choice: subsidise inputs to sustain production, or accept higher prices and the social pressure that follows.

In a place like Melbourne, the effects would likely appear first in the supermarket rather than the field. Incremental increases in staple goods, grains, meat, dairy, each justified in isolation, collectively forming a noticeable shift in the cost of living. The connection to fertiliser is not obvious to consumers, but it is direct. Less nitrogen in the soil ultimately means less protein on the plate.

There is also a strategic dimension that has been largely ignored in public discourse. Fertiliser is, in effect, food security in chemical form. A nation that cannot reliably access it is outsourcing a critical component of its sovereignty. During periods of global stress, exporting countries prioritise their own agricultural sectors. Trade flows tighten. What was once a purchasable commodity becomes a contested resource.

Australia's policy response, if the pressure intensifies, will likely follow a familiar arc. Initial reluctance to intervene—faith in markets, hope for stabilisation—followed by targeted support: subsidies, stockpiling, perhaps even quiet prioritisation of supply to key agricultural regions. In more extreme scenarios, one could imagine export controls or coordinated purchasing agreements, echoing the logic of energy security.

But there is a deeper issue that no short-term policy can fully resolve. The modern agricultural system is highly productive precisely because it is highly dependent, on energy, on global trade, on complex supply chains that operate with minimal slack. Efficiency has been maximised; resilience, less so.

The fertiliser squeeze exposes this trade-off with uncomfortable clarity. It is not simply a question of price or availability, but of systemic design. How much redundancy is a society willing to maintain in order to avoid periodic shocks? And who bears the cost of that redundancy when times are stable?

If the energy shock persists — if gas remains expensive, if geopolitical tensions continue to disrupt supply — then fertiliser will not be a one-season problem. It will become a recurring constraint, a background condition shaping agricultural decisions year after year. Yields may stabilise at lower levels. Prices may normalise, but at a higher baseline. The adjustment will be gradual, but cumulative.

And that is the real danger. Not a sudden crisis, but a slow erosion of abundance. A shift from surplus to tightness, from choice to constraint. The shelves will not be empty — but they may become more expensive, less varied, more contingent on forces far beyond the farm gate.

In that sense, the fertiliser issue is not separate from the "energy lockdown" idea — it is its agricultural counterpart. Energy constrains movement and industry; fertiliser constrains food. Together, they outline the contours of a world in which the margins are thinner, and the assumptions of effortless plenty no longer hold.

The crisis, if it comes, will not announce itself with a single dramatic moment. It will arrive season by season, invoice by invoice, harvest by harvest — until what once felt exceptional begins to feel, uncomfortably, like the new normal.

https://www.theaustralian.com.au/nation/desperately-short-fertiliser-the-new-fuel-as-farm-crisis-hits/news-story/e352d5b32d84d90ed200b657e9192837