(Latin: spring, of the spring [season])
2. Appearing or occurring in the time before summer: It was easy to observe the vernal migratory movements of the birds.
The vernal season is the period that extends from late April to late May in the northern hemisphere.3. Appropriate to or suggesting the time after winter; springlike: It was wonderful to see the vernal greenery again.
4. Suggestive of youth; characteristic of youth; such as, being vigorous and fresh: The elderly couple often had vernal longings for their young days.
The vernal equinox occurs on March 20 or 21 and the autumnal equinox on September 22 or 23, marking the beginning of spring and autumn, respectively, in the Northern Hemisphere (and the reverse in the Southern Hemisphere).
The term "equinox" comes from Latin meaning "equal night" because the days on which an equinox falls have about equal periods of sunlight and darkness.
The vernal pools don't contain fish and provide important breeding habitats for many terrestrial or semiaquatic species; such as, frogs, salamanders, and turtles.
Vernalization is commonly used for crop plants; such as, winter rye, and is possible because the seeds and buds of many plants require cold in order to break the cessation from or slowing of activity during the winter.
In order to flower at the right time, many plants must experience a period of cold to trigger the process of vernalization. If it doesn't get cold enough, flowering is considerably delayed or may not happen at all.
In addition, some of the plants which need vernalization are important food species; such as, sugar beets and wheat, which feed millions of people and provide much-needed income globally.