Define microbes.<br> </h2></div>

Which one of the following nutrients is not available in fertilizers?<br> </h2></div>

Write a short paragraph on the harmful effect of microorganism.</h2></div>

Which of the following is not organic waste?

Identify the correct sequence of steps involved in the treatment of sewage.<br> (i)   Growth of …

What are Biopesticides?</h2></div>

Which one of the following pairs serve as biofertilizers?</h2></div>

The primary treatment of sewage water involves.</h2></div>