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The plants grown in magnesium-deficient but urea sprayed soil would show

1. deep green foliage
2. early flowering
3. yellowing of leaves
4. loss of pigments in petals

Correct answer: yellowing of leaves

Solution

Magnesium is a central component of chlorophyll, so deficiency reduces chlorophyll synthesis and causes chlorosis, seen as yellowing of leaves. Spraying urea supplies nitrogen, but it cannot fully prevent the yellowing caused by lack of magnesium.

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