Knowledge about Food resources accordingly RGPV university syllabus . By Prof. Shashank Chaurasiya

1. Prepared by: Prof. Shashank Chaurasiya
Bansal College of Pharmacy, Bhopal
Environment science:
Food Resources

2. Food Resources
Food refers to anything eaten by man which gives
energy and which is able to meet physiological
needs for growth of human body
Importance offood
Food is a source of energy for man. It is used for
maintaining all body processes and activities.
for physical and mental development
for protection and regulation of body needs.

3. Sources of food
Princeton societies obtained food mainly through
gathering and hunting.
 Modern societies obtain food through
cultivation through agriculture
Domestication ofanimals
Fishing
 World food supply
Ancient period : Through gathering and hunting.
Agricultural Revolution : with the application of
science and technology world food supply increased
remarkably.

4. World food supply
It includes the adoption of
Mixed farming
Good irrigation facilities
Control of soil erosion
Quality seeds
Use of chemical fertilizers and pesticides
Good agricultural implements
Availability of storage and market facilities
Green Revolution : Resulted in remarkable increase in
food production which made a country self sufficient.
The quality of food also improved.

5. World food Problems
Large Population - Inspite of green revolution it could
not meet the needs of growing population. agricultural
land got loot due urbanization.
Energy : Farmers cannot afford fertilizers and
pesticides.
Land, weather and climate : Agriculture is a gamble on
climatic conditions
Absence of food security which depends on
food availability
purchasing power

6. Food Problems in India
The principle causes of food-shortage in India
• Want of improved methods of cultivation through
science and technology
• Poverty and lack of purchasing power
• Tillers are not in feasts
• Excessive growth ofpopulation
• Lack of cold storagefacility
• Wastage of food for ignorance of preserving method
• Wastage of food in wrong process of cooking

7. How to solve the food problem of India
• Introduction of improved method of cultivation based
on science and technology
• Improvement of financial and educational status of
Indian cultivators
• Balancing the demand with supply
• Checking population growth
• Increasing production of foodgrains
• Protection of food from rats, insecticides etc.
• Judicious distribution of available supplies
• Proper publicdistribution
• Proper transport facilities

8. Over Grazing
Live stock is an important source food in many
countries including India meat and milk are obtained
from live stock. Hence live stock less to be fed on
grazing lands.
Adverse effects of over grazing :
• Over Grazing Removes the Vegetation cover of the soil .
Plant population regeneration capacity is lost
Exposes the soil
Exposive leading toless production
Leads tosoil erosion
Leads to water infiltration capacity of soil

9. Over Grazing
Live stock is an important source food in many
countries including India meat and milk are obtained
from live stock. Hence live stock less to be fed on
grazing lands.
Adverse effects of over grazing :
• Over Grazing Removes the Vegetation cover of the soil .
Plant population regeneration capacity is lost
Exposes the soil
Exposive leading toless production
Leads tosoil erosion
Leads to water infiltration capacity of soil

10. Effects of Modern agriculture
Modern agriculture refers to carrying on agriculture with
the intensive use of irrigation facilities,
chemical fertilizers, high yielding varieties of quality seeds,
pesticides and insecticides
modern form machinery with a view to obtain higher
agricultural productivity andproduction.
It’s also called as green revolution.
Benefits of modern agriculture:
Contributed to high yields of agricultural crops.
Created awareness, interest among farmers for
implementation of better techniques.
Improved income for the farmers.
Rasied the standardof living of farmers.
Increased employment opportunities.
Increased the economy of a country.

11. Adverse impact of Modern agriculture
1. Fertilizer related problems.
Excessive usage of chemical fertilizers lead to a micro
nutrient imbalance in the soil resulting in low
production.
Nitrogen and phosphorus used in agricultural fields is
washed off and released to the neighbouring water
bodies which causes eutrophication
2. Pesticide related problem.
Excessive usage of pesticides killed not only the
targeted pests and – insects but also non targeted
species which are useful for agricultural crops and
ecosystem
Affected the quality of food crops resulting in adverse
human health.

12. Adverse impact of Modern agriculture
3. Water Logging
excess water gets accumulated in the fields due to
inadequate drainage facilities
It is because of over irrigation of agricultural fields by
farmers.
Mechanical strength of water logged soil is reduced.
4. Salinity
Use of saline water for irrigation
Presence of excess salt in the soil
Reduced crop production
5. Genetic diversity of Agricultural crops