1. Learning to: Understand plant mineral requirements
By the end:
State minerals required by plants for healthy growth.
Give reasons for each mineral.
Explain effects of mineral deficiencies.

2. Potassium deficiency
Potassium is required for producing enzymes involved in photosynthesis and respiration
A deficiency results in older yellow leaves with dead spots and a thin weak stem

3. This plant is deficient in potassium- notice the older leaves turning yellow

4. Deficiency in Nitrogen
Nitrogen is required for making proteins and chlorophyll
A deficiency results in stunted growth, small pale leaves with yellow older leaves and a thin weak stem

5. This plant is deficient in nitrogen – notice the yellow older leaves

6. Deficiency in Phosphorus
Phosphorus is required for energy transfers in photosynthesis and respiration
A deficiency results in poor root growth, stunted shoots and dark purple-green leaves