Multiple choice

Premature leaf fall can be due to the deficiency of

  1. Nitrogen

  2. Magnesium

  3. Phosphorus

  4. Iron

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phosphorus deficiency causes premature leaf fall because phosphorus is essential for energy transfer (ATP) and nucleic acid synthesis. When deficient, plants mobilize phosphorus from older leaves to younger tissues, causing senescence and leaf drop.