Fertilizers and pesticides
Studies collected in a 2025 review show potatoes after vetch, faba bean and other legumes yielded 12.7–38% more than after winter wheat, while oats alone lowered yields in one study.
Overcast weather stretches the kill time of contact desiccants to weeks, Russian growers say, while EU farms have worked without diquat since 2020.
University of Minnesota guidance advises boron for potatoes only on soils testing 0.4 ppm or less, applied to the soil. Florida advises 1.5 lb…
A 2025 Indian field study sets the critical soil magnesium level for potatoes at 42 mg/kg. University of Minnesota guidance advises magnesium on soils…
On sandy soil in Quebec, irrigation increased nitrate leaching under potatoes by 52%, and coated urea leached more than a split programme. Extension advice…
Six years after the EU ban on CIPC, the temporary residue limit for potatoes fell to 0.2 mg/kg from January 2026. Old stores remain…
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