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The residue left after extracting oil from oilseeds is called cake. When it is used as manure in the field, it is called cake manure.
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There are 2 types of oil cakes –
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Edible oil cakes- It is edible for animals like cottonseed, mustard, taramira, groundnut, taramira, sesame, coconut etc.
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Non-edible cakes- it is not edible for animals. They are used as manure in the field, like castor, mahua, neem, karanj etc. It also acts as a pesticide in the crop.
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Nitrogen is found in higher quantities in oil cakes than cow dung manure and vermicompost, as well as phosphorus and potash are also found in oil cakes.
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The number of nutrients available in different oil cakes-
Oil cake
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Nitrogen %
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Phosphorus %
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Potash %
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Castor
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4.37
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1.85
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1.39
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Mahua
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2.51
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0.80
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1.85
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Neem
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5.22
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1.08
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1.48
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Karanj
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3.97
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0.94
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1.27
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Know the method of application of oilcake in crops-
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Oil cake manure comes in the category of concentrated organic manure, it can be used in the field both pre and post sowing.
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Method of application of oil cakes pre-sowing – Apart from Mahua cake, the powder of all cakes should be used in the field 10-15 days before sowing.
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Mahua cake decomposes late, so it should be used in the field 2 months before sowing. A chemical called saponin is found in it, due to the presence of which it is a good manure for paddy crops.
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The cakes should be scattered in the field and mixed in the soil after ploughing lightly.
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Method of application of cakes post sowing – After germination, use powdered oil cake near the plant.
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Oilseeds can be used while earthing up in tuber root crops.
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Keep in mind that after putting the cakes in the field, it is very important to have enough moisture in the soil for their decomposition.
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