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Explain why earthworms are said to be the most important soil animals.
Earthworms ingest organic matter as well as soil where they mix, granulate and excrete to increase stability of soil aggregates and improve soil aeration. The holes left in soil further increase aeration and drainage
Define the Sources of sound and their level of loudness Let us now have a look at Table, where the various sources of sound, their level of loudness and its comparison to the f
discuss various types of screens and add a note on screening is a stratgy used in waste water plant
Define Whole blood – Components of Blood This is rarely employed these days, only really in instances of severe blood loss. In place of it’s almost all time separated into its
which is the heaviest matter in the world
How did the Earth form and become spherical? The Earth's Shape : About five billion years ago the solar system was forming from gases and dust floating in space. Gravity, th
what is Anemia?
Exploration of resources Exploration of resources involves complex techniques which depend on the physical, chemical and biological properties of a particular resource. Now
Why are peaty and marshy soils highly acidic? The acidity is due to decomposition of organic matter under anaerobic conditions and formation of sulphuric acid.
DISPOSAL OF WASTE MATERIALS : In a school or college science laboratory, chemical wastes, broken glassware, unserviceable non consumable items, obsolete instruments, used biologic
where do you find blood conective
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