The utilization of plants organs other than seeds or spore, without the involvement of man is known as

Natural vegetative propagation

Explanation:

Natural vegetative propagation is the ability of  plant organs other than thier seeds and spores to naturally grow and develop without man's intervention by the formation of adventitious roots and modified stems, shoots, leaves and bulbs . Examples of the plants organs from stems and roots are  bulbs cloves, corms, tubers, Plantlets, rhizomes,and crown etc.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs