Every farmer in Croatia knows the number that hurts: mineral fertilizer prices haven't returned to pre-war levels since 2022. What they don't know is that there's a trace element that costs almost nothing but can increase the nutritional value of their harvest up to 15 times. Finland has been adding it to every commercial fertilizer since 1984.
The Fertilizer Crisis Isn't Over
In the summer of 2022, natural gas accounted for up to 90% of variable costs in EU ammonia production. Result: About 70% of EU ammonia production capacity was shut down. The World Bank projects further fertilizer price increases for 2025.
Silent Problem: Europe's Soils Are Depleting in Selenium
Selenium (Se) is a trace element that plants absorb from soil in tiny amounts. Through the food chain – wheat → cow → milk → human – selenium enters every meal. No selenium in the soil, no selenium in the body.
Finland: An Experiment That's Worked for 40 Years
In 1984, the Finnish Ministry of Agriculture decided that selenium must be added to all commercial multi-nutrient fertilizers. What followed was a transformation of the entire food chain:
| Parameter | Before Program | After Program | Change |
|---|---|---|---|
| Population plasma selenium | 0.89 µmol/L | 1.40 µmol/L (optimal) | +57% |
| Daily selenium intake | 0.04 mg / 10 MJ | 0.08 mg / 10 MJ | 2× higher |
| Selenium in spring cereals | Baseline | 15× higher | +1400% |
| Selenium in beef | Baseline | 6× higher | +500% |
| Selenium in milk | Baseline | 3× higher | +200% |
Game-Changing Math
| Nutrient (per hectare) | Amount | Estimated Price 2025 |
|---|---|---|
| Nitrogen (N) | 150–200 kg | ~€250–400 |
| Phosphorus (P₂O₅) | 60–90 kg | ~€120–180 |
| Potassium (K₂O) | 100–160 kg | ~€150–250 |
| Selenium (sodium selenate) | ~15 g | ~€1–3 |
Selenium per hectare per year costs about as much as a cup of coffee. On the same area where you spend €500–800 on NPK fertilizers.
What Selenium Does in the Body
- Thyroid – without selenium, no conversion of T4 to active T3
- Immune system – critical for cell defense against oxidative stress
- Cell protection – glutathione peroxidase neutralizes free radicals
- Fertility – sperm need selenium for motility
- Heavy metal binding – selenium binds mercury, lead, arsenic and cadmium
What Farmers Can Do Now
- Talk to your regional agronomist about foliar application of sodium selenate
- Starting dose per literature: 5–10g pure selenium per hectare per year
- Measure, don't guess – explicitly request selenium analysis with soil samples
- Document – a proven selenium content in your grain is a measurable selling point
FAQ
Is selenium fertilization permitted in Croatia?
Why isn't selenium already added to Croatian fertilizers?
Can you give too much selenium to plants?
Sources
- Hartikainen H (2005). Biogeochemistry of selenium and its impact on food chain quality and human health.. Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS). PMID: 16028492
- Broadley MR, White PJ, Bryson RJ, Meacham MC, Bowen HC, Johnson SE (2006). Biofortification of UK food crops with selenium.. The Proceedings of the Nutrition Society. PMID: 16672078
- Alfthan G, Eurola M, Ekholm P, Venäläinen ER, Root T, Korkalainen K (2015). Effects of nationwide addition of selenium to fertilizers on foods, and animal and human health in Finland: From deficiency to optimal selenium status of the population.. Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS). PMID: 24908353
Note: This article is for informational purposes only, does not constitute medical advice and does not replace consultation with a doctor. Consult a doctor before taking any food supplement — especially with chronic conditions, pregnancy or breastfeeding.
