Question

Which nutrient deficiency causes "Buttoning" in Cauliflower?

• A. Nitrogen
• B. Phosphorus
• C. Potassium
• D. Boron

Hint:

Remember: Nitrogen = Vegetative growth; deficiency → small curds (buttoning).

Answer 1

The Correct Option is A

Concept: "Buttoning" in cauliflower refers to the formation of small, premature curds instead of large, well-developed heads. This is mainly due to improper nutrient supply and unfavorable growing conditions.
Step 1: Understanding buttoning.
Buttoning occurs when plants fail to achieve sufficient vegetative growth before curd formation.
Step 2: Role of nitrogen.
Nitrogen is essential for vegetative growth, including leaf and stem development.
Step 3: Effect of deficiency.
Nitrogen deficiency leads to stunted growth, causing early curd initiation and resulting in small "button-like" curds.
Step 4: Evaluating the options.

• Nitrogen $\rightarrow$ Causes poor vegetative growth leading to buttoning (correct)
• Phosphorus $\rightarrow$ Important for root development (incorrect)
• Potassium $\rightarrow$ Regulates water balance and disease resistance (incorrect)
• Boron $\rightarrow$ Causes browning and hollow stem, not buttoning (incorrect)

Step 5: Additional insight.
Other factors like over-aged seedlings, improper temperature, and poor soil fertility can also contribute to buttoning.
Step 6: Conclusion.
Thus, nitrogen deficiency is the primary cause of buttoning in cauliflower.