Question

what is the relation between night duration and crop field

Answer 1

night duration is a vision light at night whereas crop field is a field in which crops are grown.this gives idea about photoperiodism and vernalisation.

i hope it will help you 
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Answer 2

The night duration has a very solid impact on the agriculture as well as crop field.

Explanation:

• Night is time when the photosynthesis of the plant gets ceased, the plant gets time to replenish the used up enzymes of the leaves to refresh the stock for the following day.
• It is the time when the plants transport their food from leaves to different storage organs, to prepare for next upcoming day.  
• Also the temperature of the night is much lower than that of the day, which leads to the cryo effect on the crops.  
• The mist of the night is also necessary for the good amount of crops.

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