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Posted by Himanshu Jain 6 years, 7 months ago
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Posted by Harish Das 6 years, 7 months ago
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Hermoine Granger 6 years, 7 months ago
Posted by Ashwini Dwivedi 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
| Manure | Fertilizer |
| Manure is a natural or an organic substance obtained by the decomposition of plant and animal wastes. This is done by microbes, earthworms, fungus etc. | Fertilizer is a synthetic substance or an inorganic compound. |
| Low percentage of nutrients is present. | High percentage of nutrients is present. |
| Manure provides a lot of organic matter to the soil. It is slowly absorbed by the plants. | Fertilizer does not provide any humus to the soil. It is quickly absorbed by the plants. |
| Crop productivity is increased only to some certain extent. | Crop productivity is increased many folds by its use. |
| No side effects of manure are absorbed. | Chemicals in fertilisers are washed away to the nearby water bodies, causing soil and water pollution. |
Posted by Nikhil Singh 6 years, 7 months ago
- 3 answers
Yogita Ingle 6 years, 7 months ago
Useful of Bacteria
Not all bacteria are harmful to humans, in fact, some of these bacteria are quite important as they provide various functions. For instance, bacteria can:
- Convert milk into curd – Lactobacillales or lactic acid bacteria.
- Ferment food products – Streptococcus and Bacillus.
- Used in preparation of bread, cakes and other bakery food products.
- Help in digestion and improving the body’s immunity system.
- Production of antibiotics which is used in the treatment and prevention of bacterial infections.
Posted by Priyanka Nayyar 6 years, 7 months ago
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R T 6 years, 7 months ago
Posted by Anju Jain 6 years, 7 months ago
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Posted by Virat Gandhi 6 years, 7 months ago
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C Roy 6 years, 7 months ago
Posted by Jatin Mishra 6 years, 7 months ago
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Gaurav Seth 6 years, 7 months ago
Roots nodules are special structures present only in the % roots of leguminous plants, which provide shelter to nitrogen-fixing bacteria (i.e. Rhizobium). Therefore, it is found only in roots of the leguminous plants.
Posted by Prince Panchal 6 years, 7 months ago
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Gaurav Seth 6 years, 7 months ago
The nutrition in which organisms prepare their own food from inorganic raw materials like carbon di oxide and water is called autotrophic nutrition.
Posted by Ekta Bhatnagar 6 years, 7 months ago
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Jhalak And Palak Aggarwal 6 years, 7 months ago
Yogita Ingle 6 years, 7 months ago
| Plastic | Uses |
| Polythene | Used for preparing polythene bags, pipes, buckets, and unbreakable bottles. |
| Acrylic | Used for making window panes of cars and trucks. |
| Polypropylene | Used for making ropes, fibres, and popes. |
| Styrene | Used for making acid caps, cases of voltaic cells, etc. |
| Teflon | Used in making non- sticky pans. |
| Melamine | Used in making vessels. |
| Bakelite | Used for making switches, plugs, combs, handles, etc. |
| Celluloid | Used for making photographic films, combs and soap boxes. |
| PVC (poly vinyl chloride) | Used in food packaging, making of sanitary pipes. |
| LDPE (Low density polyethylene) | Used making of in food bottles and packaging of foods, polybags. |
| HDPE (High density polyethylene) | Used in making food and drink containers and in making of containers which are used in laboratory to store chemicals. |
| PET (polyethylene terephthalate) | Used in beverage bottles and food containers. |
Posted by Mariyam Noor 6 years, 7 months ago
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Posted by Gopal Yogi 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Continuous plantation of crops in a field makes the soil poor in certain nutrients such as nitrogen, phosphorus, potassium, etc. Plants require nutrients for their proper growth and functioning. When a farmer continues to grow crops one after the other, then all nutrients available in the soil reduce and the crop yield decreases automatically.
Posted by Andriod Tech 6 years, 7 months ago
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Posted by Arpan Choudhary 6 years, 7 months ago
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Gaurav Seth 6 years, 7 months ago
Antibiotics are medicines produced by certain microorganisms to kill other disease- causing microorganisms. These medicines are commonly obtained from bacteria and fungi. Streptomycin, tetracycline, penicillin, etc. are common antibiotics.
Precautions to be taken while using antibiotics:
- Antibiotics should be taken under the supervision of a well qualified doctor.
- Course (intake) of antibiotics should be completed as per the prescription given by the doctor.
- Antibiotics should be taken in the right amount and at the right time. A wrong dose of antibiotics makes the drug ineffective. Also, excessive consumption of drugs may kill the useful bacteria present in our body.
Posted by Kartik R Creatives 6 years, 7 months ago
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Sudit Kumar Sahu 6 years, 7 months ago
Posted by Nikhil Singh 6 years, 7 months ago
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Hermoine Granger 6 years, 7 months ago
Harsh Gamer 6 years, 7 months ago
Rohit Dhiman 6 years, 7 months ago
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Hermoine Granger 6 years, 7 months ago
Harsh Gamer 6 years, 7 months ago
Posted by Hansidh Raj 6 years, 7 months ago
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Posted by Nitin Sharma 6 years, 7 months ago
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Meghna Thapar 5 years, 6 months ago
If the current through a circuit is too weak, the filament does not get heated sufficiently and it does not glow. LED (Light Emitting Diodes) can be used in place of the electric bulb in the tester, LED glows even when a weak electric current flows through it. A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B.
Posted by Ishan Shukla 6 years, 7 months ago
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Posted by Tushar Mehta 6 years, 7 months ago
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Posted by Supreet Kaur 6 years, 7 months ago
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Posted by Hardik Vats 6 years, 7 months ago
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Meghna Thapar 5 years, 6 months ago
Large dams have forced some 40-80 million people from their lands in the past six decades, according to the World Commission on Dams. Indigenous, tribal, and peasant communities have been particularly hard hit. These legions of dam refugees have, in the great majority of cases, been economically, culturally and psychologically devastated.
Those displaced by reservoirs are only the most visible victims of large dams. Millions more have lost land and homes to the canals, irrigation schemes, roads, power lines and industrial developments that accompany dams. Many more have lost access to clean water, food sources and other natural resources in the dammed area. Millions have suffered from the diseases that dams and large irrigation projects in the tropics bring. And those living downstream of dams have suffered from the hydrological changes dams bring to rivers and ecosystems; an estimated 400-800 million people--roughly 10% of humanity--fall into this category of dam-affected people.
In response to the massive human rights problems and environmental impacts of large dams, affected people and supporting local and international organizations have joined together to fight for change in how and whether dams are planned, designed and built. This movement includes thousands of environmental, human rights, and social activist groups around the world. International dam-affected people’s meetings in Brazil, Thailand and Mexico in recent years have brought together dam-affected peoples and their allies to network and strategize, and call for better planning of water- and energy-supply projects. And every year, groups from around the world show their solidarity with those dispossessed by dams on the International Day of Action for Rivers, a global event to raise awareness about the impacts of dams and the values of free-flowing rivers.
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Posted by Bharti Bhardwaj 6 years, 7 months ago
- 3 answers
Yogita Ingle 6 years, 7 months ago
Various tasks; which a farmer needs to do during cultivation of crops are collectively called agricultural practices. Activities which are part of agricultural practices are as follows:
- Preparation of soil
- Sowing
- Adding manure and fertilizer
- Irrigation
- Protecting from weeds
- Harvesting
- Storage
Posted by Aman Kumar Yadav 6 years, 7 months ago
- 1 answers
Yogita Ingle 6 years, 7 months ago
Growing crops, fruits, vegetables, flowers and rearing livestock are together called agriculture.
Climate, type of soil, population density and technology
Posted by Aditi Negi 6 years, 7 months ago
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Posted by Avika Gupta 6 years, 7 months ago
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Meghna Thapar 5 years, 10 months ago
- Inexhaustible natural resources: These natural resources are present in unlimited quantity in nature and are not likely to be exhausted by human activities. Their supply is never ending and can be used again and again. Example – sunlight, water and air.
- Exhaustible natural resources: These natural resources are present in limited quantity in nature and can be exhausted by human activities. Example – natural gas, minerals, forests, wildlife, etc. These resources do not last forever.
Posted by Yashika Yashika 6 years, 7 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
When magnesium ribbon is heated, it burns in air to form a white powder called magnesium oxide.
2Mg + O2
2MgO
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