Final diagnosis


Macronutrients

Discolouration of the foliage on the potato plants in the right-hand row that have been given less nitrogen than those fertilised normally (left). <b>Nitrogen deficiency</b>
Advanced stage of <b>potassium deficiency</b> with severe leaf deformation, metallic aspect (bronzing) and brown necrosis of the edges of the leaves.
Deformation, brightness and discolouration of the leaflet margins caused by potassium deficiency
Marked necroses with light inter veinal chlorosis. <b>Magnesium deficiency</b>
Incipient magnesium deficiency (with light interveinal chlorosis and no necrosis)
Stunted potato plants, with pale yellow top leaflets. <b>Iron deficiency</b>
Manganese deficiency symptoms on potato leaves: interveinal chlorosis, small necrotic dots along the veins and the necrotic areas on leaflets margins