What will happen if several bulbs are lighted in soybean fields at night?

The pigment phytochrome is involved in:

Define/Explain: Day-neutral plant.

Which is not a requirement of vernalisation?

What is the site of perception of photoperiod necessary for the induction of flowering in plants?

On germination,a seed first produces shoots with leaves,and flowers appear later.
$(A)$ Why do you think this happens?
$(B)$ How is this advantageous to the plant?