Which is useful as biological control ?</h2></div>

Which one of the following is the correct order of conversion of waste materials during biogas formation?</h2><…

How do rhizobium bacteria increase the fertility of soil?</h2></div>

Microorganism used for commercial production of acetic acid is?</h2></div>

Who discovered the first antibiotic?</h2></div>

The graph given below represents the effect of sewage discharge on some important characteristics of river.<br> Se…

IRRI proposed which one of the following for the prevention of fertilizers pollution in agriculture?</h2>…

Which one of the following pairs is correctly matched.</h2></div>