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Question

Guano is a natural fertilizer that was extensively used in the last century. Guano is exceptionally rich in some plant nutrients and is highly sought after by organic farmers today.

Guano is made up of droppings of sea birds such as booby birds, cormorants and gulls. Since they eat sea food, they are essential in bringing nutrients from the sea to the land.

Now that you know what bird droppings are made of, which among the following nutrients is Guano most rich in?


A

Carbon

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B

Nitrogen

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C

Iron

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D

Oxygen

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Solution

The correct option is B

Nitrogen


Guano is most rich in Nitrogen. Remember that animals excrete nitrogen rich products that are obtained due to the breaking of proteins. Proteins essentially contain nitrogen and when animals break up proteins, the nitrogen is excreted as ammonia, urea or uric acid; all of which are nitrogen rich compounds.

Guano similarly, is rich in nitrogen being the excretory waste of birds. Guano is also rich in Potassium and Phosphorous and hence contains the three essential plant macronutrients: N, P and K.


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