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Sign of Chlorosis and cause:
- 1.Yellowing of plant tissue
- 2.due to limitations on chlorophyll synthesis
- 3.seen on entire plant, partial leaf, or vein.
Sign of Necrosis
- 1. death of plant tissue
- sometimes in spots
Accumulation of anthocyanin
resulting in a purple or reddish color.
5 types of deficiency or toxicity symptoms of plants are?
- 1. chlorosis
- 2. necrosis
- 3. accumulation of anthocyanin
- 4. lack of new growth
- 5. stunting or reduced growth
Nitrogen deficiency looks like . . .
light green to yellow leaves, older leaves especially, stunted growth; poor fruit development
Nitrogen excess looks like . . .
dark green foliage which may be susceptible to lodging, drought, disease and insect invasion.
Phosphorus deficiency looks like . . .
leaves may develop a wide range of coloration including dull green, yellow, or purple. stunted plant growth and delay in plant development.
Phosphorus excess looks like . . .
excess phosphorus may case micronuturent deficiencies especially iron or zinc.
Potassium deficiency looks like . . .
variable among species. usually short, yellowing (sometimes purple) and necrosis.
Potassium excess looks like . . .
excess potassium may case deficiencies in magnesium and possibly calcium.
Calcium deficiency looks like . . .
reduced growth or death of growing tips (shoot and root)
Calcium excess looks like . . .
excess calcium may cause deficiency in either magnesium or potassium.
Magnesium deficiency looks like . . .
Initial yellowing of older leaves between leaf veins spreading to younger leaves.
Magnesium excess looks like . . .
high concentration tolerated in plant; however, an imbalance with calcium and potassium may reduce growth.
Sulfur deficiency looks like . . .
initial yellowing of young leaves spreading to whole plant; similar symptoms to nitrogen deficiency but occurs on new growth.
sulfur excess looks like . . .
excess of sulfur may cause premature dropping of leaves.
Iron deficiency looks like . . .
initial distinct yellow or white areas between veins of young leaves leading to spots of dead leaf tissue
Iron excess looks like . . .
possible bronzing of leaves with tiny brown spots
Manganese deficiency looks like . . .
interveinal yellowing or mottling of young leaves
Manganese excess looks like . . .
older leaves have brown spots surrounded by a chlorotic circle or zone.
zinc deficiency looks like . . .
interveinal yellowing on young leaves; reduced leaf size
zinc excess looks like . . .
excess zinc may cause iron deficiency in some plants
Boron deficiency looks like . . .
death of growing points and deformation of leaves with areas of discoloration.
Boron excess looks like . . .
leaf tips become yellow followed by necrosis. leaves get a scorched appearance and later fall off.
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