Question:
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Tuberization in sweet potato is almost absent at 75% shade and severely affected at 55% shade and not much affected at 25% shade.
Reason (R): Warm sunny days and cool nights are favourable for better tuber development in sweet potato.
In light of the above statements, choose the correct answer from the options given below.
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Tuberization in sweet potato is almost absent at 75% shade and severely affected at 55% shade and not much affected at 25% shade.
Reason (R): Warm sunny days and cool nights are favourable for better tuber development in sweet potato.
In light of the above statements, choose the correct answer from the options given below.
Assertion (A): Tuberization in sweet potato is almost absent at 75% shade and severely affected at 55% shade and not much affected at 25% shade.
Reason (R): Warm sunny days and cool nights are favourable for better tuber development in sweet potato.
In light of the above statements, choose the correct answer from the options given below.
Show Hint
To maximize sweet potato yields, plant in open fields with full solar exposure. Avoid intercropping systems that shade the crop canopy by more than 25%.
Updated On: Jul 10, 2026
- Both (A) and (R) are true and (R) is the correct explanation of (A).
- Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
- (A) is true but (R) is false.
- (A) is false but (R) is true.
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Tuberization in sweet potato (Ipomoea batatas) is a physiological process governed by photosynthate production and translocation, which are highly sensitive to solar radiation levels and temperature regimes.
Step 2: Detailed Explanation:
- Assertion (A) is true: Sweet potato is a heliophilic (sun-loving) crop. Tuber development depends on high rates of photosynthesis to produce carbohydrates, which are then translocated to the storage roots. Under heavy shade (75% shade), photosynthesis is extremely limited, so tuberization does not occur. At 55% shade, it is severely reduced, while light shade (25% shade) does not significantly restrict the carbohydrate supply.
- Reason (R) is true: Climatic conditions characterized by warm sunny days (which optimize photosynthetic rate) and cool nights (which minimize respiratory loss of sugars) are highly favorable for starch accumulation and tuber expansion.
- Relationship: While both statements are scientifically true, the favorable temperature and day/night cycle described in (R) does not explain the direct physical effect of artificial shade percentages on light interception and photosynthate partition mentioned in (A). Thus, (R) is not the correct explanation of (A).
Step 3: Final Answer:
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
Was this answer helpful?
0
0
Top ICAR AIEEA Horticulture Questions
- In banana:
Statement (A): Bunch feeding is a simple and low-cost method.
Statement (B): It is the direct way to supply nutrients to the bunch.
Statement (C): Only micronutrients can be given through this method.
Choose the correct answer from the options given below. - The softwood grafting
Statement (I): Is done with mature, procured scion on the emerging soft, coppery-red shoot of the rootstock, which is 60-70 days old.
Statement (II): Is used for raising desired varieties of mango, sapota, tamarind and cashew.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): In garlic modified roots are economic part.
Statement (II): Characteristic odour in garlic is due to volatile organic sulfur-containing compounds that are rapidly produced upon tissue damage and diffuse into the air.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The flowers of ridge gourd start opening in the evening and remain open throughout the night.
Statement (II): Pollination of ridge gourd is done in the day time.
In light of the above statements, choose the most appropriate answer from the options given below. - Given below are two statements:
Statement (I): The first gynoecious based hybrid of bitter gourd is Pusa Hybrid-4 developed by ICAR-IARI, New Delhi.
Statement (II): The male:female ratio of the gynoecious based hybrids of bitter gourd is 25:1.
In light of the above statements, choose the most appropriate answer from the options given below.
View More Questions
Top ICAR AIEEA Plant Physiology Questions
- Which phytohormone is regarded as an anti-stress promoter and growth bio-stimulator?
- Which of the following is a C4 plant?
- The peg formation in groundnut are positively
- Given below are two statements:
Statement (I): The non deep type is the most common primary dormancy
Statement (II): In this type of dormancy species require light or darkness to germinate or chilling stratification
In light of the above statements, choose the most appropriate answer from the options given below: - Best training method in high density peach planting
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions