Question

what are the most important requirement for the propagation ​

Answer 1

Explanation:

Cuttings and Temperature

It is important to note that soil temperature, not air temperature, is the critical factor in rooting. Cuttings of most plants root best when the rooting medium is at about 70 degrees, though temperatures as low as 55 degrees are acceptable.

Answer 2

Answer:

Sound is a sequence of waves of pressure which propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). During their propagation, waves can be reflected, refracted, or attentuated by the medium.