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 […]
Estimation of Organic Carbon and Calcium Carbonate | Soil Analysis
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In this article we will discuss about the estimation of organic carbon and calcium carbonate for analysing soil. Estimation of Organic Carbon: Principle: Soil is digested with chromic acid (K2Cr2O7 + H2SO4) making use of the heat evolved in the mixture. The excess chromic acid that is not reduced by the organic matter in the […]