For potatoes, fertilization programs will differ depending on the use of the crop. Potatoes require a greater amount of Potassium than all other elements.
As potassium is mobile within the plant, deficiency symptoms can develop on both young and full-sized leaves during periods of extreme deficiency. Leaflets will become crinkled and some leaves will display marginal necrosis. Meanwhile, during more advanced deficiency status, the plant can display symptoms of interveinal necrosis.
In cases of sulfur deficiencies, potato leaves show an overall chlorosis. The veins and petioles display a distinct reddish color, while yellowing is fairly uniform over the entire plant, including young leaves.
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