Question

Explain photoperiod

Answer 1

photo period is the duration of Sunlight that plants gets to grow well

Answer 2

Photoperiod, also called light duration and day length (or daylength), refers to the length of the light period as contrasted to darkness within a day. Day length controls or influences several plant growth and development processes that determine or affect crop yield.

The difference in day length can have a marked influence on the establishment and yield of certain crops. As already mentioned, giant potatoes and cabbages have been produced in Alaska (about 61°N) during summer when light is intense and almost continuous. In the corn belt region of the United States which lies about 44°N, day length in June to July exceeds 16 hours and solar radiation is at maximum. As a result, yield of a 180-day corn crop can go as high as 22 tons per hectare. In contrast, the yield potential of hybrid corn in the Philippines is only up to 13 tons/hectare (Lantican 2001). However, corn season in the Philippines is only about 120 days.

On the other hand, some temperate crops may perform differently when grown in the tropics due to pronounced difference in light duration. But for cauliflower, cabbage, beets, and some other temperate crops, it seems that the temperature during the growing period is the most limiting factor (Vergara 1978).

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