Agronomy - Study Mode
[#761] Crop mixture have proved biologically most dynamic under
Correct Answer
(C) Water stress condition
Explanation
Solution: Water stress is the condition when the water supply is limited to its roots, and the transpiration rate become intense. When plants are subjected to water stress it causes changes in stomatal response, ROS scavenging, metabolic changes, and photosynthesis. These collective responses lead to an adjustment in the growth rate of plants as an adaptive response for survival.
[#762] Short day plants requires about how much light in a day for good flowering?
Correct Answer
(A) 8 h
Explanation
Solution: Plants are differentiated based on the requirement of direct sunlight, short-day plants flowers only when the day length is less and plants get approximately 8 hours of sunlight while the other one is long day plants that flower when the day length is more than twelve hours.
[#763] The greenhouse effect is cause due to
Correct Answer
(B) Increase in CO 2 in the atmosphere
Explanation
Solution: The greenhouse effect is the condition of the trapping of the sun's infrared radiations which ultimately increases the temperature of the earth. Various gases are responsible for this effect like carbon dioxide, water vapour, nitrous oxide, methane, ozone, etc. the rise in the percentage of these gases because of pollution in the air lead to rising in the greenhouse effect.
[#764] Toxic alkaloid present in Sorghum is
Correct Answer
(C) Dhurrin
Explanation
Solution: Sorghum contains hydrocyanic acid and toxic alkaloid dhurrin and dihydroergosine. Dhurrin is a cyanogenic glycoside produced in many plants. It is discovered in multiple varieties of sorghum as the culprit of cattle poisoning by alkaloids.
[#765] IPM stands for
Correct Answer
(D) Integrated Pest Management
Explanation
Solution: IPM Is Integrated Pest Management . It is a sustainable, science base, decision making process that combines biological, cultural, physical and chemical tools to identify, manage and reduce risk from pests in a certain way that minimizes overall economic, health, and environmental risks.