1. Role and deficiency symptoms of phosphorous in Mango
Improved yield in mango and to maintain sustainability of the soil, require judicious application of phosphorous through organically and inorganically. But continuous and imbalanced use of phosphorous through chemical source affect the soil health as well yield of the mango tree.
Therefore, it is important to apply phosphorous judiciously by both organic and inorganic source to get higher yield without affecting soil health.
Hence to have knowledge of role and deficiency symptoms of phosphorous is important for timely and judicious application of phosphorus in mango.

2. Objective After completing this lesson, you will be able to :
Explain the role, deficiency symptoms, and symptoms of excess of phosphorous in mango

3. Role of phosphorous in Mango
Phosphorus favours root system development, production of a strong trunk, and retention and maturation of fruits.
Improves yield and quality of fruit in mango.
Phosphorus is required to synthesis ATP, cellular molecules engaged in respiration process to support plant life. P is also found in other bio-molecules such as nucleic acids, enzymes, certain proteins and in cell membrane phospholipids.
It increases the disease resistance in plants, due to stout and vigorous growth.

4. Deficiency symptoms
Slowing growth, premature falling of leaves, drying and death of branches are seen due to phosphorous deficiency
Due phosphorous deficiency, substantial decreases in yield are also caused.
Deficiency of P may result in a weaker root system.

5. Deficiency symptoms Restricting the uptake of water and nutrients.
Slowing the maturation of the fruits, which acquire a course texture.
An early symptom is the development of reddish purple colour on the underside of leaves, first starting as spot, spreading over the entire leaf with viens finally becoming reddish purple.

6. Deficiency symptoms
The higher level of phosphorus in shoots of Dashehari found favourable for flower-bud formation.
Development of necrotic areas on the margins of leaves which become chlorotic and sheds heavily.