Which of the following adds / add nitrogen to the soil?1. Excretion of urea by animals2. Burning of coal by man3. Death of vegetation
Select the correct answer using the codes given below.
Consider the following organisms1. Agaricus2. Nostoc3. Spirogyra
Which of the above is / are used as biofertilizer / biofertilizers
Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by
Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
In the grasslands, trees do not replace the grasses as a part of an ecological succession because of
Variations in the length of daytime and nighttime from season to season are due to