Which river was known as the ‘Sorrow of

Which one is cole-crop:

Mycorrhiza is a symbiotic association between 

In conservation tillage, the minimum land surface covered by crop residues is

Metarhizium anisopliae is used for control of:

On what basis are algae further categorized into different classes among the given options?

The rotation intensity of rice-wheat-rice-fallow rotation will be:

Which of the following States in India leads in Safflower cultivation?

Critical period of crop weed competition in wheat plant is ______

A nitrogen fixing blue green algae is