GK
SOIL AND AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The optimum cardinal temperature point for germination of rice seeds is-
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18
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20
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30
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37
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Explanation:
Detailed explanation-1: -It has been found that the optimum temperature for germination of seed is 25oC-35oC. Below or above the optimum temperature range, the seeds do not germinate.
Detailed explanation-2: -A seed can germinate between 0∘ C to 50∘ C but the optimum temperature for a seed to germinate is 25∘ C to 35∘ C.
Detailed explanation-3: -The optimum cardinal temperature is the temperature at which crop growth and performance are at their maximum. The maximum cardinal temperature is the highest temperature at which plant growth can occur (Alvarado & Bradford, 2002. A hydrothermal time model explains the cardinal temperatures for seed germination.
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