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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
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Navigation and Astronomy: As we have said earlier, by the edd of the Middle Ages, trade on land and over the seas was being Sken up on a big scale. By the fifteenth centur
world map
what is a chemical
When, in the geologic column, did dinosaurs become extinct at the Cretaceous-Tertiary boundary
Biotechnology in agriculture: Production of enough food to meet the demands of an ever-increasing population in the world is a major task and a challenge to agricultural scient
Explain the Formation of sedimentary rocks? Lithification refers to the processes by which loose sediments are consolidated into new rock material. One of the most common forms
Controlling Air Pollution: Now let us see, how air pollution can be controlled. i) Photochemical smog-eliminating this would require large scale changes in life style
How to make a filter A plant pot with a plug of cotton wool in the bottom and a layer of sand a few inches deep makes a satisfactory filter for many purposes. Make some mudd
what is meaned by circular motion
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