The various methods of crop improvement are:
$I$. Selection
$II$. Hybridization
$III$. Polyploidy
$IV$. Mutation breeding
$V$. Genetic engineering
Choose the correct option.

Which is the oldest breeding method?

In crop improvement programmes,haploids are of great importance because they

India's wheat yield revolution in the $1960s$ was possible primarily due to

Consider the following four statements $(a-d)$ regarding the successful cultivation of chickpea in an area where bacterial blight is common:
$(a)$ Spraying of Bordeaux mixture.
$(b)$ Control of the disease vector.
$(c)$ Use of disease-free seeds.
$(d)$ Use of disease-resistant varieties.
Which of the above are the most effective strategies for managing this disease?

Which of the following is considered as the root of any breeding program?