Agronomy - Study Mode

[#816] Heteromorphic seeds of Asteraceae and Chenopodiaceae don't permit . . . . . . . . exchange.
Correct Answer

(C) Gaseous

Explanation

Solution: Heteromorphic seeds of Asteraceae and Chenopodiaceae don’t permit gaseous exchange. Heteromorphic seeds usually differ in colour, size and shape as well as in dispersal, dormancy, and germination. It may be considered an adaptation to maximize the fitness of plants under harsh and unpredictable environments.

[#817] Which of the following elements is not considered as fertilizer nutrient
Correct Answer

(A) Carbon

Explanation

Solution: As per the botanist, there are 17 essential elements required for plant growth and these are Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sulphur, Boron, Chlorine, Iron, Manganese, Zinc, Copper, Molybdenum and nickel. Carbon is not on the list of essential nutrients and is not considered a fertilizer nutrient.

[#818] Atrazine used as an antitranspirant
Correct Answer

(C) Affects the closure and opening of stomata

Explanation

Solution: Antitranpirants are substances that are applied to reduce the transpiration process in plants to protect them from drying out too quickly. Atrazine is a widely used herbicide that can be applied to control broadleaf and grassy weeds. To some extent it can also be used as Antitranspirants as in low concentrations it induces stomatal closing which leads to stopping transpiration for some time.

[#819] . . . . . . . . is used to treat seed potato to break dormancy.
Correct Answer

(B) Thiourea

Explanation

Solution: Thiourea is the chemical fertilizer used to treat seed potatoes to break their dormancy. It is a catalyze inhibitor, which triggers potato tubers germination and healing of tuber injuries.

[#820] Recovery of sugar in sugarcane crop in India is
Correct Answer

(A) 8 - 10%

Explanation

Solution: Sugar recovery is the percentage of sugar produced after processing of definite weight of sugarcane. The Recovery rate of the sugarcane crop in India as per the latest reports from last year's financial year is about 8 - 10%.