All of the genetic factors, maternal environment, storage conditions, collecting methods and the degree of maturity, moisture content, size, shape and colour of seeds can affect hardseed percentage.
Fruits and vegetables like strawberries, cucumbers, and even broccoli are over 90% water and can supplement liquid intake while providing valuable nutrients and fiber.
Instead, this data gives more weight to models that suggest asteroids are the source of water on Earth, even though their water content is generally very low.