Which one of the following is not used as biofertiliser?</h2></div>

The last step of biogas formation is</h2></div>

Which of the following is generally not polluted by the use of chemical fertilisers?

What are biofertilisers? Give two examples. </h2></div>

Name a food product prepared by the action of bacteria.</h2></div>

Why the efficacy of Biogas is less than Natural gas.</h2></div>

Which one of the following is associated with denitrification?</h2></div>

Match the pairs.<br> <table class="wysiwyg-table"><tbody><tr><td><b>'A' gr…