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State about the Soil Aggregation and Soil Structure
In the context of soils the term 'structure' refers to the shape that the soil takes. It may exist as individual particle or as a combination of primary soil particles into secondary particles called as aggregates. The individual unit of soil structure is called a pad whether as an aggregate or otherwise. An aggregated structure modifies the influence of texture with regard to moisture and air relationships, availability of plant nutrients, action of microorganisms, and root growth.
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
A cloud in a bottle You can make a cloud form in a bottle. Get a large glass bottle and fit with a rubber stopper carrying a 10-cm length of glass tubing. Place about 2.5 cm of
To measure the volume of air in the longs Invert a bottle full of water so that its neck is in the surface of water in ajar. Introduce a glass or rubber tube into the neck and
why is oxygen is important to plants?
Anthropological Evidence Modern humans arose at a time when the Earth was going through a very cold and icy period called the Ice Age, which began about 75,000 years ago and
Determine the Crop factors of fertilizers Crop responses to fertilizers vary with the nature as well as the variety of the crop which in turn is related to the cation exchange
Model water wheels A meat skewer or a knitting needle can be used as an axle. An old typewriter ribbon- spool or a sticking plaster reel is useful as a basis for these improvis
Explain the Maintenance of Electrolyte Balance In the process of formation of urine, the kidneys also maintain electrolyte balance. Sodium is the most important cation that exi
what is global warming?
why and where endomitosis happen?
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