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Intrusion into the Nitrogen Cycle:
Human intervention can disturb the nitrogen cycle. Let us see how. When we grow and harvest crops. there is loss of nitrogen from the soil, as it is utilised in the building up of plant body. Similarly, harvesting of timber results in heavy outflow of niirogen from our forest ecosystem. You may say that we can compensate for the loss of nitrogen by adding commercial fertilisers to our fields or by large scale cultivation of nitrogen-fixing plants. Yes. you'are right. so long as the right type of fertilisers are applied in proper quantities. Heavy addition of commercial fertilisers cause excessive build up of nitrogen in the soil and groundwater, and nutriept enrichment of rivers, lakes etc. Automobile and industrial exhausts add nitrogen oxides, especially nitrogen dioxide, at an alarming rate to the atmosphere. Nitrogen dioxide reactg with moisture in the atmosphere to form weak nitric acid, which is carried to the soil dyring rainfall, and ultimately to the water table. The results of nutrient enrichment of rivers, lakes etc; presence of excessive nitrogen oxides in the atmosphere; and the excessive formation and addition of nitric acid to the soil.
Explain Change of posture - Decreased Cardiac Output When a person stands up from lying down posture, there is an immediate but transient fall in systolic blood pressure. This
Some potato cores were weighed and then placed into a dilute sugar solution. After 2 hours, they were taken out of the solution, dried on a paper towel and weighed again. The mass
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five charactrstic of the contour lines
#question.find the specific gravity of blood lymph and water.?
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Explain the term - Ants Ants are the most widespread species of insects in soil and consume plant residues, but are more active in humifying insects than plants.
How the Acid/Base Balance is maintained in an Acid Diet? Let us first see how the acid/base balance is maintained in an acid diet. The sequence of steps involved includes: 1
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