Which one of the following is not used in organic farming?</h2></div>

<span>Which of the following is used as a biological pesticide?</span></h2></div>

Biofertilizers are:</h2></div>

Stoppage of reproduction in an organism by creating hurdle in its biology or physiology or its destruction by use of ano…

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

During sewage treatment biogas produced includes</h2></div>

What is the nutrient medium for beer?

Match column I with column II and select the correct answer from the given codes. <br> <table class=&q…