Question

The technique of pegging a branch in the soil is called as
A.Grafting
B.Cutting
C.Vegetative propagation
D.Layering

Answer 1

Hint: In the layering process, a layer of rooted stem follows the detachment or removal from the parent plant. The tip of the branch is pegged into the soil where it develops adventitious roots. It is a type of natural vegetative propagation. Vegetative propagation is also called asexual propagation.

Complete answer:Explaination of above options are:
(A) Grafting is the horticultural technique used to join different parts of a plant from two or more plants so that they can grow as a single plant. In grafting, the upper part is called scion and the plant grows the root system called rootstock of another plant.
(B) Stem cuttings a piece of stem is part buried in the soil which including at least one leaf node. The cutting is able to produce new roots from the node. It is a process in which a section of the root is buried just below the soil surface which is not so deep in the soil and produces new shoots.
(C) The technique of pegging a branch in the soil is known as layering, any form of asexual reproduction occurs in plants in which a new plant grows from a part of the parent plant and grows from a specialized reproductive structure like stolon, rhizome, tuber, corm, or bulb.
(D) The development of roots from a stem of a plant in which the stem is still attached to the parent plant is called layering. A layer is a rooted stem following detachment (removal) from the parent plant. Some plants propagate naturally by layering, but sometimes during plant propagation external support is required in this process.
Hence, The correct option is (D) Layering.

Note:Techniques for vegetative propagation include different processes namely,
a.Air or ground layering.
b.Division.
c.Grafting and bud grafting, widely used in fruit tree propagation.
d.Micropropagation.
e.Stolons or runners.
f.Storage organs such as bulbs, corms, tubers, and rhizomes.
g.Striking or cuttings.
h.Twin-scaling.