Yara Kenya - Are your potatoes getting enough calcium? Calcium deficiency is widely known as internal rust spot - a physiological internal defect in which small brown spots appear in the tuber.
Improve potato quality by minimising mechanical damage | Agriculture and Food
Why have my potatoes got brown spots inside? | Page 2 | The Farming Forum
Potato - Internal rust spot, internal brown spot
Tuber internal defects in sCAX1 lines and the wild type. (A) Atlantic... | Download Scientific Diagram