10/11/2025
Detailed Mineral Deficiencies in Plant Leaves
1) *Nitrogen Deficiency*
Role: Essential for chlorophyll, leaf growth, and protein synthesis
Signs:
• Older leaves exhibit pale green to yellow discoloration (chlorosis)
• Plant growth becomes stunted
• Stems appear thin and weak
• Leaves may drop prematurely
Why it happens: Poor soil quality, excessive rainfall, and sandy soils
2) *Phosphorus (P) Deficiency*
Role: Crucial for root development, energy transfer, and flowering
Signs:
• Leaves display dark green, bluish, or purple hues
• Plant growth is stunted
• Flowering and fruiting are delayed
• Stems appear thin and short
Why it happens: Cold soil, compact soil, and low organic matter
3) *Potassium (K) Deficiency*
Role: Regulates water balance and disease resistance
Signs:
• Leaf edges exhibit brown discoloration (leaf scorch)
• Necrotic spots appear
• Leaf tips curl
• Older leaves show symptoms first
• Weak stems and poor fruit quality
Why it happens: Sandy soil, high calcium or magnesium levels in soil
4) *Calcium (Ca) Deficiency*
Role: Essential for cell wall formation, root, and shoot tips
Signs:
• New leaves appear distorted, curled, or small
• Growing tips die (apical necrosis)
• Blossom end rot in tomatoes
• Bitter pit in apples
Why it happens: Low transpiration, acidic soil, excess potassium or magnesium
5) *Magnesium (Mg) Deficiency*
Role: Constituent of chlorophyll
Signs:
• Interveinal chlorosis (yellowing between veins)
• Green veins remain visible
• Older leaves affected first
• Leaves become brittle
Why it happens: Acidic soil, excessive potassium or calcium
6) *Sulfur (S) Deficiency*
Role: Involved in protein synthesis and enzyme activity
Signs:
• New leaves uniformly yellow
• Weak and thin growth
• Similar to nitrogen deficiency but affects young leaves first
Why it happens: Sandy soil, very low organic matter
7) *Iron (Fe) Deficiency*
Role: Essential for chlorophyll formation in new leaves
Signs:
• New leaves turn yellow with green veins
• Leaves remain small
• Severe cases: entire leaf turns white
Why it happens: Alkaline soil (high pH), excess phosphorus
8) *Zinc (Zn) Deficiency*
Role: Involved in growth hormones and enzyme systems
Signs:
• Small, narrow leaves (little leaf)
• Interveinal chlorosis
• Shortened internodes → bushy appearance
• Rosette formation
Why it happens: High pH, excess phosphorus, sandy soils
9) *Manganese (Mn) Deficiency*
Role: Participates in photosynthesis reactions
Signs:
• Yellowing between veins (similar to iron)
• Brown spots on leaves
• Young leaves affected first
10) *Boron (B) Deficiency*
Role: Essential for cell wall, flower, and fruit formation
Signs:
• New leaves thick, cracked, or brittle
• Growing point dies
• Hollow stems in some plants
