food reasource and destruction

1. TOPIC
FOOD RESOURCES
PRESENTED BY :-
 USHA AGARWAL (22BCON150)
 DEEPANSHU GUPTA (22BCON151)
 LAKSHIT MEENA (22BCON152)
 VIKASH MOOND (22BCON153)
PRESENTED TO :-
 DR. POONAM HARIYANI

2. CONTENT :-
1. FOOD RESOURCES .
2. WORLD FOOD PROBLEMS.
3. CHANGES CAUSED BY AGRICULTURE AND OVER GAZING.
4. EFFECT OF MODERN AGRICULTURE.
5. PROBLEMS OF HIGH YIELDING VARITY OF CORPS AND GM CORPS.
6. PROBLEMS OF FERTILIZERS, PESTICIDES AND SALINITY.

3. FOOD SOURCES
ANIMAL PLANT
TASTE PERCEPTION :-
 SWEET
 SOUR
 SALTY
 BITTER
 UMAMI

4. WORLD FOOD PROBLEM :-
 PRODUCTION OF FOOD VS GROWING DEMAND.
 FOOD PRODUCTION IN 64 OF THE 105 DEVELOPING COUNTRIES IS LEGGING
BEHIND THEIR POPULATIONS GROWTH LEVELS.
 THE GREEN REVOLUTION OF THE 60’S REDUCED STARVATION IN INDIA.
BUT….
 OUR FERTILES SOILS OR BEING EXPLOITED FASTER .
 FORESTS,GRASS LANDS AND WET LANDS WERE CONVERTED TO AGRICULTURAL
USE.
 OUR FISH RESOURCES SHOW EVIDENCE OF EXHAUSTION.
 DISPARITIES IN AVAILABILITY OF NUTRITIOUS FOOD.
 FAMINE :-
> FAILURE OF CROPS CAUSED BY DROUGHT,FLOOD OR CATASTROPJIC
EVENT.
> TEMPORARY BUT SEVERE SHORTAGE OF FOOD.

5. CHANGES CAUSED BY AGRICULTURE AND
OVERGRAZING
CHANGES BY AGRICULTURE :-
 GLOBAL EFFECT .
 REGIONAL EFFECT .
 LOCAL EFFECT .
CHANGES BY OVERGRAZING:-
 REDUCTION IN THE GROWTH OF
VEGETATION.
 REDUCTION IN THE DIVERSITY OF
PLANT SPECIES.
 INCREASES SOIL EROSION AS THE
PLANT COVER IS REDUCED.
 DOMINANCE OF PLANT SPECIES
THAT ARE RELATIVELY
UNDESIRABLE TO THE CATTLE.
 DAMAGE FROM THE CATTLE
TRAMPLING ON THE LAND , LIKE
PATHS MADE BY CATTLE DEVELOP
INTO GULLIES, WHICH ERODE
RAPIDLY IN THE RAIN.

6. EFFECTS OF MODERN AGRICULTURE :-
 CLIMATE CHANGE
 DEFORESTATION
 GENETIC ENGINEERING
 IRRIGATION
 POLLUTANTS
 SOIL DEGRADATION
 WASTE
 ISSUE BY REGION

7. PROBLEMS OF HIGH YIELDING VARITY OF CORPS AND GM CORPS :-
 REGIONAL INEQUALITIES .
 INTRAREGIONAL INEQUALITIES .
 INTERCROP DISPARITIES .

8. PROBLEMS OF GMOs :-
 GMOs ARE UNHEALTHY.
 GMOs CONTAMINATE FOREVER.
 GMOs INCREASE HERBICIDE USE.
 GENETIC ENGINEERING CREATES DANGEROUS SIDE EFFECTS.
 GOVERNMENT OVERSIGHT IS DANGEROUSLY LAX.
 THE BIOTECH INDUSTRY USES “TOBACCO SCIENCE” TO CLAIM PRODUCT SAFETY.
 INDEPENDENT RESEARCH AND REPORTING IS ATTACKED AND SUPPRESSED.
 GMOs HARM THE ENVIRONMENT.
 GMOs DO NOT INCREASE YIELDS,AND WORK AGAINST FEEDING A HUNGRY WORLD.

9. PROBLEMS OF USING FERTILIZERS :-
 EXPENSIVE
 OVER USAGE CAN DAMAGE PLANTS
 TOXIC
 REDUCE SOIL QUALITY
 ALTERATION OF ECOSYSTEM
 NITRATE POLLUTION
 EUTROPHICATION
 MICRONUTRIENT IMBALANCE

10. EFFECT OF USING PESTICIDES :-
 PESTICIDE RESISTANCE IS A PROBLEM
ASSOCIATED WITH THE WIDESPREAD USE OF
PESTICIDES .
--> INSECTICIDES ONLY KILL SUSCEPTIBLE
INDIVIDUALS.
--> MOST SURVIVING INDIVIDUALS HAVE
CHARACTERISTICS THAT ALLOWED THEM TO
TOLERATE THE PESTICIDE.
 RISK OF CANCER
 BIO-MAGNIFICATION
 DEATH OF NON-TARGET ORGANISMS .

11. PROBLEMS CAUSED BY SALINITY :-
 WATER NOT ABSORBED BY SOIL,IS EVAPORATED LEAVING BEHIND A THIN LAYER
OF DISSOLVED SALTS IN THE TOP SOIL.
 SALINE SOILS YIELD LESS CROP.
 SALT DEPOSIT IS REMOVED BY FLUSHING WITH GOOD QUALITY WATER.
 BY USING A SUB – SURFACE DRAINAGE SYSTEM, THE SALT WATER IS FLUSHED
OUT SLOWLY.
 THE FACTORS CONTIBUTING TOWARDS THE PROBLEM OF SALINITY ARE ALMOST
SAME AS THAT OF WATER LOGGING.
 EVERY AGRICULTURAL SOIL HAS CERTAIN MINERAL SALT IS CALLED ALKALI
SALTS IN IT LIKE NaCl , Na2CO3 , Na2SO4 .
 ACID RAIN (ENHANCES WEATHERING : SALT PRODUCTION)

12. SNAP OF SALINITY

13. THANK YOU