Symptoms: Yellowing first Appears on the older leaves, followed by gradual discoloring of the entire leaf. Affect: Sucrose content is reduced.
Phosphorous Deficiency
Symptoms: Leaf margins and bottom of side of leaves will turn purple. Affect: Plants are usually stunted..
Nitrogen Deficiency
Symptoms: Older leaves turn to yellow colour. Affect: Growth was stunted.
Iron Deficiency
Symptoms: The base of the youngest leaves appear bleached,while the leaf tips and margins initially remain green. Affect: Colour of potato will be dull.
Copper Deficiency
Symptoms: The tips brown and become necrotic. Affect: Young leaves curl upwards.
Calcium Deficiency
Symptoms: Normal development of growing points is inhibited,cupping of leaves. Affect: Tuber quality and keeping quality is reduced.
Boron Deficiency
Symptoms: Leaves have a dark thick and appearance and curl upwards. Affect: Growing points die off and plant display a typical bushy appearance with short inter nodes.