3. Cultivar and rootstock genotypes
Affects taste, yield, nutrient composition
and postharvest life
Antioxidant activity (Potato)
Ascorbic acid (Peppers)
-carotene (Sweet potato)
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4. Mineral nutrition
Nitrogen
• Higher N level stimulate vegetative growth
causing shading and ultimately death of lower
fruity wood
• Delays fruit maturity in stone fruit
• Poor red colour
• Inhibits ground colour change (green to yellow
in peach)
• Fruit disorders (
5. Calcium
Deficiency of calcium leads to
physiological disorders
• Bitter pit in apple
• Corkspot in pear
• Blackheart in celery
• Blossom end rot in tomato
• Cavity spot in carrot
• Tipburn of lettuce
6. Irrigation
Amount of water
Time of water application
• Under water stress
• lower fruit size and higher soluble solid contents
• Deep suture and double-fruit formation