Secondary treatment is also known as ________________.<span><br> </span></h2></div>

Vitamin <span class="katex"><span class="katex-html" aria-hidden="true"><sp…

<i>Azolla</i><span> is used as a biofertilizer, because it</span></h2></div&gt…

The organism which is used commercially for the production of statins is</h2></div>

Green manuring enhances crop yield by<br> </h2></div>

The technology of biogas production was developed in India through the efforts of</h2></div>

Which one of the following nitrogen fixing root nodule symbiotic is associated with the trees of Alnus and Casuarinas?&l…

Some blue green algae can be used as biofertilizer as they are</h2></div>