Question

Mention the role of the following nutrients in plants. Also, mention at least two effects of their deficiency.

1. Nitrogen
2. Potassium

Answer 1

Nitrogen and Potassium are two primary macronutrients in plant growth and development.

1. Nitrogen is a building component of proteins, chlorophyll, and cytoplasm. (1 mark)
   Its deficiency causes:
   • Retarded/stunted growth in plants (0.5 mark)
   • Yellowing of plant leaves (0.5 mark)
2. Potassium is required by the plant in order to perform several metabolic activities. (1 mark)
   Its deficiency causes:
   • Development of weak stem (0.5 mark)
   • Wilting of leaves (0.5 mark)