HOW TO DIAGNOSE SOIL NUTRIENT DEFICIENCIES
If the soil is missing a nutrient, maize plants may be unhealthy. Each soil
nutrient deficiency causes different symptoms in the plant. To diagnose the
1. Use the flowchart to identify the problem in your plants.
2. Refer to the month to learn more about the symptoms and solutions.
3. Confirm a diagnosis with other farmers or an agricultural extension worker.
4. Treat the deficiency.
Where is the problem located on plant?
All leaves Bottom (old) leaves Top (new) leaves
What is wrong with the leaves? What colour are the leaves? What colour are the leaves?
Purple edges Yellow Dying, brown edges
Phosphorus (Feb, Jul) Where are leaves yellow? Molybdenum (Sept)
Leaf edge Leaf middle
Potassium (Oct) Nitrogen (Jan, Aug)
Yellow Wide bands beside
Sulphur (Apr) middle of leaf
Pale yellow or white stripes Leaves are misshapen Small dead spots on leaves.
Magnesium (May) Leaves and stems break easily
Leaf tips stick to Leaves curled,
lower leaves grey-green colour
Calcium (Jun) Drought (Dec)