Slow growth of tops and roots; leaves turn yellow-green when young, or to orange, red, or purple when mature(veins may turn purple), beginning from bottom leaves to top; reduction in number of flowers and yield of grain or fruit; slow growth and delay in opening of buds.

Similar to Nitrogen except leaf color either dull bluish green with tints of purple instead of yellow or red -OR -leaves dull bronze with purple or brown spots; leaf edges often brown, especially in potatoes.

If deficiency is mild, stems are thin; if severe, stems stunt or die; leaves usually dull bluish green, often with yellow streaks between veins, followed by browning of tips and edges, with brown spots developing at edges; leaves rolled starting at bottom leaves; poor root growth, and poor development of fruit, flowers, or grain.

Leaves turn yellow, sometimes between veins, sometimes in spots or streaks; then turn brown and die, beginning at bottom of plant.

Similar to magnesium but symptoms start at top of plant.

Reduced growth; curling down of leaves at tips. Similar to Nitrogen deficiency except that lower leaves are not lost.

Begins at upper leaves; leaves become light green (lighter at base) veins turn purple, leaves may have faint streaks and yellowing, then turn orange.  Plant stops growing; roots down at tips with tissue breakdown at base; poor growth of tops and roots; flowers drop off; no grain or fruit.

Severe yellowing of newer leaves (either spotted or total); more often visible in trees than in yearly crops.

Molted spots on leaves, first yellowish then yellow or purple-red. Appears late in summer, then leaves drop early.  Leaves become crinkled and small.

Similar to Nitrogen deficiency since molybdenum is required for nitrogen fixing bacteria;  leaves become yellow between veins, first on mature leaves. Young leaves may become severely twisted and eventually die.