NEET BIOLOGY

Detailed explanation-1: -In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed? The correct answer is (4) Gibberellins. This is because – Gibberellins shows bolting when gibberellin is sprayed on sugarcane crop, the length of the stem increases.

Detailed explanation-2: -Final answer: Gibberellins are sprayed on sugarcane stems to increase the yield.

Detailed explanation-3: -Spraying sugarcane crop with gibberellins increases the length of the stem, thus increasing the yield by as much as 20 tonnes per acre.

Detailed explanation-4: -Potassium, like nitrogen, also boosts strong cane development, long internode growth, wider cane girths and yield. Supplies need to be balanced alongside those of N. Magnesium, sulfur and iron increase photosynthetic activity maintaining good growth for high yields.

Detailed explanation-5: -a. Increase yield of sugar cane: Giberellins (Spraying sugarcane crop with gibberellins increases the length of the stem and hence increases the yield of sugarcane by about 20 tonnes per acre). b. Promote lateral shoot growth: Cytokinins (These are generated in regions where rapid cell division occurs).