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Micronutrient deficiency symptoms: how to read the leaves
A field guide to reading nutrient deficiency symptoms: old leaves or new, pattern and colour, which nutrient each points to, and the look-alikes to rule out.
Start with where the symptom appears. Nutrients that move in the plant (nitrogen, phosphorus, potassium, magnesium, molybdenum) show on old leaves first. Nutrients that do not move (iron, zinc, manganese, copper, boron, calcium, sulphur) show on young leaves, tips, flowers or fruit. Then look at the pattern and colour, rule out pests, disease, water and weather, and confirm with a soil or leaf test.
By Gafar Laiya and the Gujarat Bio Organics team. Updated November 2026.
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Step 1: old leaves or new leaves?
| Where it starts | Nutrients to suspect |
|---|---|
| Old, lower leaves | Nitrogen, phosphorus, potassium, magnesium, molybdenum |
| Young, upper leaves | Iron, zinc, manganese, copper, sulphur |
| Growing tips, flowers and fruit | Boron, calcium |
Step 2: the pattern
| What you see | Nutrient it often points to |
|---|---|
| Old leaves yellow between green veins, reddish tints | Magnesium |
| Young leaves yellow with a fine green vein net, normal size | Iron |
| Young leaves small, narrow and bunched, short internodes | Zinc |
| Young leaves pale between veins with broad green bands and small spots | Manganese |
| Young leaves uniformly pale, veins also yellow | Sulphur |
| Shoot tips wilt and die back, white leaf tips, empty grain | Copper |
| Growing tip dies, brittle thick leaves, flower and fruit drop, cracked fruit | Boron |
| Blossom-end rot, bitter pit, tip burn, empty groundnut pods | Calcium |
| Legume pale like nitrogen shortage, poor nodules, whiptail in cauliflower | Molybdenum |
| Older leaf tips and edges burnt on saline water | Chloride excess |
| Soft droopy leaves, lodging, more blast and borer in rice | Silicon |
Step 3: rule out the look-alikes
- Sucking pests and mites: check the underside of leaves with a hand lens.
- Viruses: mosaic patterns, curling and stunting that spread plant to plant.
- Fungal and bacterial disease: spots with rings or margins, rotting, a spreading pattern.
- Herbicide drift: sudden damage along the field edge or in the wind direction.
- Waterlogging, drought, cold and heat: the whole field changes after the weather does.
- Root damage from nematodes, termites or root rot: lift a plant and check the roots.
Step 4: confirm before you spend
- A soil test shows what the soil can supply. The Soil Health Card test covers zinc, iron, manganese, copper, boron and sulphur.
- A leaf test shows what the crop actually took up.
- A strip test: spray one nutrient on a few rows and compare the new growth after one to two weeks.
- Keep photos with dates so you can compare later.
Taking a useful photo for advice
- Photograph a whole plant, then a close-up of the worst leaf, both sides.
- Show the youngest and the oldest leaves.
- Add a photo of the field to show the pattern.
- Send it to us on WhatsApp with the crop, age and recent fertilizer and spray history.
Doses depend on the crop, soil and product, so this page gives methods, not amounts. Take the dose from your soil test report, the product label or your local agriculture officer or KVK. Results differ from farm to farm with soil, weather, crop and management. Farmer experiences on this site are their own reports, not a promise of results.
Read next
When several nutrients are short: interactions and why one fix fails
How nutrients block or help each other, why a field can show one deficiency when the real limit is another, and why treating the visible symptom often fails.
Read the full guideHow to diagnose and correct micronutrient deficiency
Step by step: observe, rule out other causes, test, fix the cause, choose the method, time it right, and build soil so the shortage does not return.
Read the full guideHow Gujarat Bio Organics can help
Since 2006, lakhs of farmers from Kashmir to Kanyakumari have used Immunity products on almost every crop: from the mango farms around Somnath to the apple orchards of Himachal Pradesh and Kashmir, the tea estates of Assam and Darjeeling, and the banana, coconut and cardamom farms of Tamil Nadu, Karnataka and Kerala. Each Special is one formula made for one crop and its common problems. Tell us your crop, soil test and what you see, and our team will tell you what to check, whether a micronutrient correction is needed, and which Special fits your programme.
- Mango guide and Immunity Mango Special
- Sugarcane guide and Immunity Sugarcane Special
- Potato guide and Immunity Potato Special
- Cotton guide and Immunity Cotton Special
Results differ from farm to farm with soil, weather, crop and management. Farmer experiences on this site are their own reports, not a promise of results.
Questions
How can I tell which nutrient is deficient from the leaves?
First check whether old or young leaves show it, then the pattern and colour. Use the table on this page, rule out pests and disease, and confirm with a soil or leaf test.
Can two deficiencies show at the same time?
Yes, and it is common in Indian soils. The symptoms mix, so testing is the reliable way to know.
Do deficiency symptoms go away after treatment?
Leaves already damaged usually stay marked. The new growth after correction shows whether the treatment worked.