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i) Nitrogen uses.
- Formation of proteins
- Part of chlorophyll
- Vegetative growth
- Increase grain size.
Deficiency.
- Chlorosis/ yellowing
- Stunted growth
- Premature leaf fall
- Very short roots
Excessive supply
- Excessive succulency in grains
- Lodging
- Weak stems
- Delayed maturity
ii) Phosphorous used.
- Protein and enzyme formation
- Shoot growth
- Root development
- Synthesis of sugar
- Seed formation
Deficiency
- Purplish leaves
- Less fruit/ grain/ low yield
- Stunted/ slow growth
- Delayed maturity
- Poor root development
- Weak/ slender stems
iii) Potassium uses.
- Carbohydrate formation
- Uptake of nutrients
- Resistance against diseases
- Strengthen straw/ cell wall
- Development of chlorophyll
- Neutralise organic acids.
Deficiency.
- Lodging/ weak stems
- Chlorotic leaf surface
- Scorching at tips and margin
- Premature defoliation
- Mottling/ brown spots on leaves
- Stunted growth.
Kavungya answered the question on March 28, 2019 at 09:54
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