Environmentally optimized fertilization – when food strengthens us, not harms us

In today's agriculture, chemical fertilizers are often used to quickly grow crops. However, when we apply too much artificial nitrogen, we create several problems:

• Plants grow quickly but don't have time to build up the nutrients (minerals, antioxidants, fibers) that are important for us humans.
• Excess nitrate and nitrite can accumulate in plant tissue – especially when the plant's nitrogen stores are full – and these substances have potential health risks if converted into nitrosamines in the body.
• The soil's carbon balance is disrupted: microbial life (bacteria, fungi, worms) is weakened, carbon is destroyed, and the soil loses its ability to retain nutrients and water.
• The plant's collaboration with mycorrhizae and other microorganisms is limited, which impairs mineral uptake (e.g., zinc, iron, magnesium) and biological growth.
• Several studies report that high nitrogen applications often lead to lower product quality and increased levels of nitrate in edible parts.
• Nitrate (NO₃⁻) is very soluble and can leach into groundwater if not absorbed by the plant.
• When part of nitrate is converted into nitrite (NO₂⁻) in the body, this can in some cases contribute to the formation of harmful compounds (nitrosamines).

The alternative path: Environmentally optimized fertilization

Instead of flooding the soil with synthetic nitrogen, environmentally optimized fertilization is based on:

1. The right amount at the right time – avoid exceeding the plant's needs.
2. Biologically active fertilizers – fertilizers that activate the microbiome to release nutrients in interaction with the plant.
3. Carbon-building materials – such as biochar, composts, plant residues – which bind carbon in the soil and strengthen the soil's structure.
4. Microbial balance and symbiosis – where fungi and bacteria help the plant absorb the nutrients it needs.
5. Controlled nitrogen supply – avoid the risk of residual nitrate accumulating in the crop or leaching out.

When fertilization is balanced, the plant has the opportunity to develop close to the optimal nutrient composition – with high levels of protein, fiber, minerals, and antioxidants. The soil becomes richer and more stable, and the risk of us ingesting harmful nitrate/nitrite levels decreases.

Conclusion

With high synthetic fertilizer applications, we can lose crop quality, soil health deteriorates, and the plants' natural interaction with microbial life is inhibited. Furthermore, the risk of nitrate and nitrite accumulating in the crop increases, with possible negative effects on our health when they are converted in the body.

With environmentally optimized fertilization, we get a holistic solution: soil, plant, and human all benefit simultaneously – by guiding nature, rather than fighting against it.

Sources and references

1. Santamaria, P. (2006). Nitrate in vegetables: toxicity, content, intake and EC regulation. Journal of the Science of Food and Agriculture, 86(1), 10–17.

➝ Overview of nitrates in food, risks, and EU regulation.

1. Colla, G. et al. (2018). Nutrient management in organic farming: Nitrogen use efficiency and nitrate leaching. Scientia Horticulturae, 236, 70–77.

➝ Shows how different fertilization strategies affect nitrate uptake and leaching.

1. European Food Safety Authority (EFSA). (2017). Re-evaluation of nitrate and nitrite as food additives. EFSA Journal, 15(6).

➝ Risk assessment of nitrate/nitrite and their conversion to nitrosamines.

1. Sutton, M. A. et al. (2011). Too much of a good thing: Nitrogen pollution from human activities. Nature, 472, 159–161.

➝ How high nitrogen applications affect the environment and ecosystems.

1. Liu, X. et al. (2016). Nitrogen fertilization and its impact on food quality and human health. Plant and Soil, 405, 1–17.

➝ The link between over-fertilization, nutrient quality in crops, and health risks.

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