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What is Nitrogen Determination in Soil Samples about?
The document describes two experiments to determine nitrogen and phosphorus levels in soil and plant samples. [1] The first experiment uses the Kjeldahl method to determine total nitrogen in a soil sample. This involves digesting the sample in sulfuric acid, distilling the digest to convert nitrogen to ammonium sulfate, and then titrating the distillate to find the nitrogen level. The soil sample was found to contain 18.9% nitrogen. [2] The second experiment uses the vanadomolybdophosphoric yellow color met
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