Question

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

• A. Application of iron and magnesium to promote synthesis of chlorophyll and treatment of the plants with nitrogen
• B. Frequent irrigation of the crop
• C. Application of boron and calcium
• D. Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5- trichlorophenoxy acetic acid

Answer 1

The correct option is A Application of iron and magnesium to promote synthesis of chlorophyll and treatment of the plants with nitrogen

If a pulse crop possesses premature yellowing of leaves and decrease in yield then application of magnesium and iron to promote the synthesis of chlorophyll may become most beneficial to overcome the problem and to obtain maximum seed yield. Magnesium is an important part of the ring structure of the chlorophyll molecule and its deficiency causes chlorosis and premature leaf abscission. In iron deficiency also, the leaves become chlorotic because iron is required for the synthesis of some of the chlorophyll-protein complexes in the chloroplast. Along with these, the crop plants can also be treated with nitrogen.