Q28 / 200 · NEET 2006 · Botany

Farmers in a particular region were concerned that pre-mature yellowing of leaves ora pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

  • Correct answer
    A
    application of iron and magnesium to promote synthesis of chlorophyll
  • B
    frequent irrigation of the crop
  • C
    treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
  • D
    removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

Solution

Premature yellowing of leaves in pulse crops occurs because of degradation of chlorophyll. $\mathrm{Mg}$ and $\mathrm{Fe}$ are required for the biosynthesis of chlorophyll. Hence, $\mathrm{Mg}$ and Fe supplements will increase the yield of pulse crops.

Hence, the correct answer is option: 'A'.

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