Plant Propagation techniques may be described as cloning your plants, these techniques are invaluable for those who need to produce higher yields!

Plant Propagation Techniques - Exposing The Truth

Asexual propagation is the best way to maintain some species, particularly an individual that best represents that species. Clones are groups of plants that are identical to their one parent and that can only be propagated asexually. The Bartlett pear (1770) and the Delicious apple (1870) are two examples of clones that have been asexually propagated for many years.

The major methods of asexual propagation are cuttings, layering, division, and budding/grafting. Cuttings involve rooting a severed piece of the parent plant; layering involves rooting a part of the parent and then severing it; and budding and grafting are joining two plant parts from different varieties.
Methods of Plant Propagation

There are two categories of plant propagation: asexual and sexual.

Asexual propagation is used to maintain selections of known identity and quality and includes such techniques as division, air-layering, grafting and cuttings. Asexual propagation creates plants that are genetically identical to the parent plant.

Sexual propagation is a natural process resulting in a parent plant forming seeds that create offspring that are not genetically identical to the parent plant, as in asexual propagation.
Even More Methods of Propagation

Which plants work with what propagation techniques?
PDF Guide

Propagation methods and topics covered include seeds, seed starting, and seed preservation, as well as cuttings, division, grafting, layering, bulbs, corms, rhizomes, offsets, runners, and more.

Plants are propagated for many reasons, including species preservation and commercial production, but for the hobby gardener, the primary reasons are food and income.
PlantPropagation.com

A wonderful book to purchase that is chock full of information!
Secrets of Plant Propagation