Different fertilisers —organic and mineral—can significantly affect potato quality and yield. Organic options like fresh or composted farmyard manure and aerated slurry tend to improve dry matter content and reduce nitrogenous compounds such as nitrates and free amino acids, compared to high rates of mineral fertilisers. While mineral fertilisers often increase fresh yield, it may negatively impact certain quality traits. Slurry shows intermediate effects. Dry matter and starch yields are generally similar across treatments, but quality indicators such as extract darkening and electrical conductivity vary with fertiliser type and rate. Organic fertilisation offers environmental benefits and stable quality, while mineral fertilisers may boost yield but require careful management to avoid excess nitrogen accumulation. For farmers, balancing fertiliser choice with crop quality goals is key.