Zinc & Sulphur in Cumin Quiz Quiz

Explore essential aspects of zinc and sulphur management in cumin cultivation, covering nutrient functions, deficiency symptoms, and application strategies.

1. Role of Zinc in Cumin Growth

   Which of the following best describes the primary role of zinc in cumin plant development?

   1. Zinc provides structural support in cell walls
   2. Zinc helps in enzyme systems and protein synthesis
   3. Zinc is responsible for flower coloration
   4. Zinc is the main energy source for cumin plants

   Explanation: Zinc is crucial for various enzyme systems and protein synthesis in cumin plants. It does not serve as an energy source or provide structural support in cell walls—these roles are linked to other nutrients. Flower coloration is influenced by factors like genetics and other micronutrients, not mainly zinc.

2. Sulphur Deficiency Symptoms

   What is a common visible symptom of sulphur deficiency in cumin crops?

   1. Purple spots on older leaves
   2. Reddish stems and delayed flowering
   3. Uniform yellowing of younger leaves
   4. Necrotic leaf margins

   Explanation: Sulphur deficiency typically shows as uniform yellowing (chlorosis) of the younger leaves due to its immobility in plants. Purple spots are usually associated with phosphorus deficiency. Reddish stems and delayed flowering are not classic indicators. Necrotic leaf margins are more linked to potassium deficiency.

3. Zinc Application Methods

   In cumin cultivation, which method ensures the most effective zinc uptake by plants?

   1. Irrigation with saline water
   2. Basal soil application of zinc sulphate
   3. Spraying phosphorus-rich foliar sprays
   4. Broadcasting elemental sulphur on the surface

   Explanation: Applying zinc sulphate directly to the soil at planting stage is effective for zinc uptake in cumin. Elemental sulphur does not supply zinc. Saline water can harm plants and does not provide zinc. Foliar application of phosphorus-rich sprays does not address zinc requirements.

4. Sulphur's Role in Plant Metabolism

   Why is sulphur considered essential for cumin seed quality and yield?

   1. Sulphur is vital for oil synthesis and protein formation
   2. Sulphur replaces the need for nitrogen
   3. Sulphur increases plant height only
   4. Sulphur primarily controls pest outbreaks

   Explanation: Sulphur is key for oil synthesis and protein formation, influencing cumin seed quality and yield. It does not directly increase plant height or control pests. Sulphur cannot substitute nitrogen, as both have separate functions in plant metabolism.

5. Interaction of Micronutrients in Cumin

   What negative effect can excessive phosphorus fertilization have on zinc availability in cumin soils?

   1. It increases zinc mobility in the soil
   2. It completely replaces the need for zinc
   3. It neutralizes sulphur in the root zone
   4. It reduces zinc uptake due to antagonistic interaction

   Explanation: Excessive phosphorus can decrease zinc uptake in cumin because of antagonistic interactions in the soil. It does not enhance zinc mobility or make zinc unnecessary. Phosphorus has no direct neutralizing effect on sulphur in the root zone.