The following is an account of carbon, oxygen, hydrogen, nitrogen, phosphorus, calcium, sulphur and water cycles: 1. Carbon Cycle: Carbon is contained in all organic compounds: carbohydrates, proteins, fats and nucleic acids which make up a living being. (a) Carbon Dioxide goes into the Living Beings from Atmosphere: The main source of carbon of living beings is the free atmospheric [...]
Read this essay in Hindi to learn about the biotic and abiotic components of an ecosystem. पारिस्थितिक तंत्र किसी स्थान विशेष पर उपस्थित विभिन्न जैविक तथा अजैविक कारकों से बनी ऐसी प्राकृतिक इकाई है जिसके विभिन्न कारक पारस्परिक क्रिया द्वारा एक स्थिर तंत्र का निर्माण करते हैं । इसमें जैविक तथा अजैविक कारकों के मध्य एक चक्रीय पक्ष द्वारा विभिन्न [...]
This article provides a flow diagram of the nitrogen cycle. Nitrogen is one of the very important elements in biosphere. It remains in various forms in different environmental components, viz., as gases N2 and NOx; as ions in soil and water NO3, NO2, NH4+, or as organic material or insoluble nitrogenous materials Among these, atmosphere possesses 78% of nitrogen (by [...]