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✅ In this video,

✔️ Class: 9th
✔️ Subject: Biology
✔️ Chapter: Improvement in Food Resources
✔️ Topic Name: Manure
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00:00 Introduction Improvement In Food Resources
00:38 Manure
10:59 Manure : compost And vermicompost
14:26 Green Manure
20:41 Website Overview
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Points covered in this video:-
Manure contains large quantities of organic matter .
Supplies small quantities of nutrients to the soil.
Prepared by the decomposition of animal excreta and plant waste.
Manure helps in enriching soil with nutrients and organic matter and increasing soil fertility.
The bulk of organic matter in manure helps in improving the soil structure.
This involves increasing the water holding capacity in sandy soils.
In clayey soils, the large quantities of organic matter help in drainage and in avoiding water logging.
We we use biological waste material, which is advantageous in protecting our environment from excessive use of fertilizers.
Using biological waste material is also a way of recycling farm waste.
Based on the kind of biological material used, manure can be classified as:
Compost and vermicompost:
The process in which farm waste material like livestock excreta (cow dung etc.), vegetable waste, animal refuse, domestic waste, sewage waste, straw, eradicated weeds etc. is decomposed in pits is known as composting.
Rich in organic matter and nutrients.
Prepared by using earthworms to hasten the process of decomposition of plant and animal refuse. This is called vermicompost.
Green manure:
Prior to the sowing of the crop seeds, some plants like sun hemp or guar are grown and then mulched by ploughing them into the soil.
These green plants thus turn into green manure which helps in enriching the soil in nitrogen and phosphorus. .

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