Which two numbers and two signs should be interchanged

Crop growth and development are primarily governed by following environmental factors

Adoption index suitable for Laggards is

Alkali soil having pH of-

In delinting process, the ration of concentrated sulphuric acid to cotton seed is:

Crop raised to protect the main crop from adverse impact of nature and also to provide support to the crop is called:

Most of the uplands of Chhattisgarh are

Sulphur requirement is high to crops belonging to the family:

Black heart of potato is a -

A chicken that is raised specially for meat production?

The mixture of breeding lines having the same genetic constitution, but differing at a specific locus is known as