What is genetic manipulation ? How is it useful in argicultural practices ?

Solution:
A process in which genes of desirable characters are taken from a plant and transferred to another plant which lacks these genes, leading to the production of varieties with desirable agronomic characteristics like dwarfness in cereals, and tallness and profuse branching in case of fodder crops.
Genetic mainpulation is useful in developing varieties with:-
(i) Higher yield
(ii) Good quality
(iii) Biotic and abiotic resistance
(iv) Shortening of the maturity duration
(v) Wider adaptability and
(vi) Desirable agronomic characteristics