Root crops demand MoP (Muriate of Potash) ie for cultivating potatoes more MoPs are needed. It didn't mean other fertilizers no need to apply, rather balanced fertilizer is essential for optimum yield.
The best fertilizer combination to grow potatoes is a balanced fertilizer with higher levels of potassium and phosphorus than nitrogen, such as a 5-10-10 or 8-24-24. A balanced fertilizer is necessary because potatoes need a mixture of nutrients for healthy growth and development. It is important to choose a fertilizer that will provide the best results based on the type of soil you are working with, the amount of daylight your plants are getting, and the nutrient needs of your potatoes.
One way is to search for specialized fertilizers of potatoes in the local market, another way is to search for papers about potato plant nutrient in NCBI.