The name of Norman Borlaug is associated with which of the following?

Consider the following four measures $(1-4)$ that could be taken to successfully grow chickpea in an area where bacterial blight disease is common.
$(1)$ Spray with Bordeaux mixture
$(2)$ Control of the insect vector of the disease pathogen
$(3)$ Use of only disease-free seeds
$(4)$ Use of varieties resistant to the disease
Which two of the above measures can control the disease?

Which widely grown variety of rice,developed by the International Rice Research Institute $(IRRI)$ in Manila,Philippines,helped solve the food crisis in Asia?

Discuss the two main limitations of plant hybridization programme.

Crop rotation is carried out for

In India,$Jaya$ and $Ratna$ are varieties of which crop that were developed for the Green Revolution?