This is about the Role of Students in Nature Conservation with focus on agriculture as part of the World Nature Conservation Day observed on 28.7.2020 presented in a Webinar.

1. Role of Students in Nature Conservation
Dr. J. Diraviam
Senior Scientist and Head, ICAR Krishi Vigyan Kendra
Pulutheri Village, R.T. Malai(PO),Kulithalai(TK), Karur(DT) - 621 313.
Mobile: 9488967675 Email: jdiraviam1@gmail.com;
Website: www.skvkk.org; FB: Icar KVK Karur
Presented in the State level Webinar organized National Service Scheme,
St. Joseph’s College (Autonomous), Trichy on 28th July 2020 on the
occasion of World Nature Conservation Day

2. “Earth provides enough to satisfy every man's needs,
but not every man's greed.” ― Mahatma Gandhi
“Conservation is a cause that has no end. There is no
point at which we will say our work is finished." -
Rachel Carson
“Conservation means the wise use of the earth and its
resources for the lasting good of men." - Gifford
Pincho

3. Natural Resources

4. World Nature Conservation Day
• On 28 July 2020, World Nature Conservation
Day is observed to raise awareness about the
significance of natural resources and encourage
the people about the practices of protecting
nature resources.
• A healthy environment is key to a healthy and
sustainable society. On this World Nature
Conservation Day, people should put an effort to
protect the earth and conserve the natural
resources.

5. Significance of World Nature Conservation Day
• Conservation of nature is of utmost importance to
all human beings and their life on Earth.
• Earth has given essential need to live like water,
air, trees, animals, food, soil, minerals, etc. so its
people duty to keep the environment safe and
clean.
• There are so many threats to nature, such as
deforestation, illegal trade in wildlife, pollution,
plastics use, chemicals, industrial developments,
and many more factors. So, it is important to
protect nature and to create a healthy
environment for present and future generations.

6. 6

7. Desert Locust invasion – Linked to Climate Change

8. Role of students in Nature conservation
• Raise awareness among people all over the world
to understand the importance of saving resources,
recycle it, preserve it and also understand the
consequences of damaging it.
• Make nature conservation a Movement – start
immediate action at individual, family and
community levels
• Document the efforts and get support of
Government, Civil Society and the general Public

9. Things to do immediately
• Recycling: Try to buy reusable and biodegradable
products as much as possible. Recycle everything if it is
possible.
• It is necessary to reduce the consumption of water.
• Reduce the use of electricity. When your work is done
with an electric appliance then turn it off. In this way
energy and money both will be saved.
• Plant trees and make planet green.
• Grow vegetables. In market vegetables that are available
are grown with chemicals and pesticides. So, it is better
to plant vegetables and eat organic food.

10. Palymrah seeds planting by College students

11. • To avoid littering it’s better to do composting.
• As we know that batteries are dangerous for environment so,
it is batter to use rechargeable batteries.
• Don't smoke. Smoking is injurious to health and sometime it is
seen that people after smoking don't throw cigarette in the
dustbin but on the ground directly which is just a pure littering.
• To reduce pollution, global warming maintain car.
• Aware people about the use of conservation of Nature,
Environment and energy.
• There are also three essential words about the conservation
of environment that is reduce, recycle and reuse.
Things to do immediately

12. Conservation of Soil
Soil loses its fertility due to erosion. So we need to conserve
the soil. Soil conservation means checking soil erosion and
improving soil fertility by adopting various methods.
1. Maintenance of soil fertility: The fertility can be maintained by
adding manure and fertilizers regularly as well as by rotation of
crop.
2. Control on grazing: Grazing should be allowed only on the
areas meant for it and not on agricultural land.
3. Reforestation: Planting of trees and vegetation reduces soil
erosion by both water and wind.
4. Terracing: Dividing a slope into several flat fields to control
rapid run of water. It is practiced mostly in hilly areas.
5. Contour ploughing: Ploughing at right angles to the slope
allows the furrows to trap water and check soil erosion by rain
water.

13. Different mulching

16. Commodity Virtual water
1 cup of coffee 140 litres
1 litre of milk 800 litres
1 kg maize 900 litres
1 kg of wheat 1100 litres
1 kg of rice 3000 litres
1 kg sugar 3200 litres
Virtual water for some important products

18. Conservation of water

19. Furrow BBF
Flooding
Surface irrigation (Gravity):
 Wild flooding
 Flooding
 Boarder strip
 Check basin
 Basin
 Furrow Irrigation
-Alternate furrow
-Skip furrow
Micro-irrigation (Pressurized) :
 Drip
-Surface and sub-surface drip
 Sprinkler
 Rain gun
Methods of Irrigation
Rain gun
Check basin
Border strip
Ring basin

20. Conservation of Forests
• Forests is an important part of the environment, because
trees clean the air and keep the atmosphere cool. We
cannot live without plants, because the oxygen need for
breathing is produced by plants.
• Trees absorb sunlight and reduce the heat. Plants provide
fodder for animals, firewood, timber, medicines, honey, wax,
gum, lac and food for us.
• Tree roots penetrate deep into the soil and from cavities in
the ground. The dry leaves which fall on ground, cover the
soil and absorb more rain water, which slowly percolates
through the soil. Thus, a large portion of the rain water can
be retained in the field, by planting more trees. Flooding or
rivers can be prevented by protecting trees in the forest.

21. Melia dubiaCasuarina
Gmelina arborea
Pterocarpus santalinus
Tectona grandis
Albizia falcataria
Ailanthus excelsa
Pongamia pinnataThespesia populnea
Erythrina indica
Neolamarckia cadamba
Bamboos
Leucaena leucocephala Grevillea robusta
Swietenia macrophylla
Santalum album
Khaya senegalensis Populus deltoides
Dalbergia sissoo
Eucalyptus
Chukarsia tabularis
Toona ciliata
Acacia leucophloea
Grevia tiliifolia
Acrocarpus fraxinifolius
Simarouba glauca
Ceiba pentandra
Calophyllum inophyllum
Terminalia arjuna
Azadirachta indica
TREES SUITABLE FOR AGROFORESTRY IN TAMILNADU

22. Khaya + Small onion Melia dubia +
Bhendi
Eucalyptus + Curry leaf Casuarina + Chillies Populus + Varagu
Sissoo + Black gram Casuarina +
Groundnut
Casuarina + Cowpea Melia + Casuarina
Melia + Bottleguard
Ailanthus + Banana Ailanthus + Brinjal

23. Conservation of Biodiversity
• There are two basic strategies for conservation of biodiversity:
• (i) In-situ conservation
• (ii) Ex-situ conservation
• (i) In-situ (on site) conservation includes the protection of plants
and animals
• within their natural habitats or in protected areas. Protected
areas are areas of land or sea dedicated to protection and
maintenance of biodiversity. For example: e.g., National Parks,
Wildlife Sanctuaries, Biosphere Reserves, etc.
• (ii) Ex-situ (off site) conservation is the conservation of plants
and animals outside their natural habitats. These include
Botanical Gardens, Zoo, Gene Banks, DNA Banks, Seed
Banks, Pollen Banks, Seedling and Tissue Culture etc.

24. Biodiversity Conservation

25. WOLF SPIDERS

26. JUMPING SPIDER
DWARF SPIDER
ORB SPIDER
ORB SPIDER

27. LONG-JAWED SPIDER
LYNX SPIDER

28. GROUND BEETLE
LONG HORNED GRASSHOPPER

29. CRICKETS
CRICKET
MIRID BUG

30. ASSASSIN BUGS
DAMSELFLIES

31. EAR WIG
PTEROMALID WASP -
PREDATOR OF HOPPERS
ANT FEEDING
BLACK BUG ANDEGGS

32. WATER BUGS

33. FUNGUS INFECTED BPH
FUNGUS INFECTED BUG
COCCINELLID BEETLES

34. Chipko Movement
Recent Chipko movement in India
is one of the best examples. This
movement was started by the
women in Gopeshwar village in
Garhwal in the Himalayas. They
stopped the felling of trees by
hugging them when the
lumbermen arrived to cut them.
This saved about 12000 square
kilometers of the sensitive water
catchment area. Similar
movements also occurred in some
other parts of the country.

35. Key Message of Greta Thunberg's Speech At The U.N.
Climate Action Summit
• People are suffering. People are dying.
Entire ecosystems are collapsing. We are
in the beginning of a mass extinction.
• "For more than 30 years, the science has
been crystal clear.
• “The popular idea of cutting our emissions
in half in 10 years only gives us a 50%
chance of staying below 1.5 degrees
[Celsius], and the risk of setting off
irreversible chain reactions beyond human
control.
• "To have a 67% chance of staying below
a 1.5 degrees global temperature rise –
the best odds given by the
[Intergovernmental Panel on Climate
Change] – the world had 420 gigatons of
CO2 left to emit back on Jan. 1st, 2018.
Today that figure is already down to less
than 350 gigatons.

36. Dr. Nammalwar explains Organic farming in Tamil
For video visit: https://www.youtube.com/watch?v=YR5HObrWA3s

37. Dr. Nammalwar explains tree planting in Tamil
• For video visit:https://www.youtube.com/watch?v=US5_EvOgWo4

38. THANK YOU!!!
“The Earth will not continue to offer
its harvest, except with faithful
stewardship. We cannot say we love
the land and then take steps to
destroy it for use by future
generations.” – Pope St. John Paul II