Ammonium or nitrate: nitrogen forms in potato nutrition
The question “which nitrogen is better?” has no answer without soil conditions — and too much available N can delay tuber set and cut dry matter.
POTATOES.NEWSGlobal potato industry intelligenceNutrient forms, soil conditions and the complete potato season.
Potato Nutrition partner · URALCHEM ↗
The question “which nitrogen is better?” has no answer without soil conditions — and too much available N can delay tuber set and cut dry matter.
Potato tubers remove about 5.8 kg K₂O per tonne, according to the PDA — but multiplying yield by that figure gives offtake, not a fertilizer rate.
Moderately acidic soil helps suppress common scab, but there is no single pH target for every farm — it is a trade-off between disease and nutrient availability.
Potato yields are decided long before harvest — they are built phase by phase, from the moment a sprout pushes through the soil to the last weeks of tuber bulking. A fertiliser programme that ignores the crop's…