The prickly pear weed (<i>Opuntia</i>) became a menace and it has been successfully controlled by&l…

The residue left after methane production from cattle dung is:</h2></div>

Which fuels can be obtained by microbial process ? Why is it necessary to increase the use of such fuels?</h2><…

 Identify the blank spaces A, B, C and D in the following table and select the correct answer. <br&…

Find out the pairs which are correctly matched.<table class="wysiwyg-table"><tbody><tr><t…

Which one of the following is useful in rice fields?</h2></div>

Why are blue green algae not popular as biofertilisers? </h2></div>

They help in increasing soil fertility.</h2></div>