P and M

Prayers vs. Nature Meditations-

Prayers are acknowledgement and Thanksgiving of God.
Prayers may be in the form of mantras, recitals, ceremonies, rituals, offerings, devotional songs.

Nature joy meditations are also belief of God but without the usual regulations or rituals that may be associated with prayers.
Silent meditations are sitting with nature surroundings, and letting your thoughts clear up a bit.
These meditations are not associated with any particular religion.

Both prayers and meditations have a certain time limit as we have duties and responsibilities also to fulfill.
P and M give us a sense of direction and a clear thought process, so both should be given equal opportunity and importance, and should be done separately or alternatively.