The removal of substances from a mixture of two or more substances is termed as separation.
Examples- filtering water, separating vegetables and fruits, sieving the flour, straining tea.
If we observe the grains carefully; we will find tiny stones, insects, etc. in it which needs to be separated before consuming it.
Methods of Separation:
Different methods are used for separating substances that are mixed together.
Separation is carried out on the basis of difference in size, shape, mass, etc.
Some common methods are:
Threshing
Winnowing
Hand-picking
Sieving
Threshing:
It is done to separate seed from a harvested plant.
It is a part of harvesting process.
It involves separating the grains from the straw either by impact, friction or combining action.
Importance:
Any delay between cutting and threshing diminishes the grains, especially during field drying or when the crop is stacked in the field. So, this process is very important.
