Question

Why is FAA (Formaline Aceto Alcohol) added after collecting the water sample?

Answer 1

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Soil is the upper humus, containing a layer of the earth, consisting of rock and mineral particles mixed with decayed organic matter.  Soil sustains plant life and contains numerous living organisms. Soil, along with air and water, is one of the three most important natural resources, which we cannot live without.  A productive soil contains approximately 46% mineral matter, 4% organic matter, 25 % water and 25% air. An approximate composition of soil shown below 

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