Managing Potato Starch Content

Potatoes are one of the most important sources of starch worldwide. Variety choice is very important and potatoes with greater than 13% starch content are required in countries such as Germany. The higher the starch content, the lower the waste.

Crop Nutrition and Potato Starch Content


Nitrogen is an essential nutrient to fuel canopy growth, however in temperate climates, an excess supply of nitrogen at later stages of growth will keep the crop growing, delaying maturity and may reduce starch content, reducing processing potato crop quality.


Phosphate fertilizer use can influence starch quality. By increasing the tuber P content, the viscosity of the gelatinized starch is also increased and the gelatinization temperature decreased.