Upload NowIn this article we will discuss about the estimation of nitrogen by Micro-Kjeldahl method for analysing soil. Next to C, H and O, N2 is the element found to be present in living beings. It occurs in amino acids, purine and pyrimidine bases, vitamins, amino sugars, etc. However, the major nitrogen source is protein and […]
Estimation of Nitrogen: Micro-Kjeldahl Method | Soil Analysis
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Estimation of Phosphorus and Potassium | Soil Analysis
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In this article we will discuss about the estimation of phosphorus and potassium for analysing soil. Estimation of Available Phosphorus: i. Olson’s Method: Principle: Available phosphorus is extracted from soil with N/2 sodium bicarbonate with pH adjusted to 8.5. By adding molybdate and stannous chloride solution a blue colour develops and this is read on […]
Chemical Oxygen Demand (COD) in Water | Biotechnology
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In this article we will discuss about the principle, requirements and procedure for determination of Chemical Oxygen Demand (COD) in water. Since there are more amounts of various chemically oxidisable organic substances entering water systems, BOD alone does not give a clear picture of organic matter content of water. Principle: A known volume of potassium […]