CBSE Class 9 Science Notes – Chapter 12 : Improvement In Food Resources

CBSE Class 9 Science Notes – Chapter 12 : Improvement In Food Resources

Food Sources

  • Plant: Obtained from agriculture
  • Animals: Obtained from animal husbandry

Need For Efficiency Of Crops And Livestock

  • The population of India is growing at a faster rate hence more amount of food is required to meet the rising demand.
  • The agricultural land is limited as compared to the growing population.

Efforts Made To Meet The Increase In Food Demands

  • Green Revolution: The introduction of modern technology and equipment, usage of fertilizers and high-quality seeds.
  • White Revolution: Increasing the growth of milk production by introducing dairy development programs.

The introduction of these revolutions has led to an increased use of natural resources hence now sustainable methods of increasing crops and livestock efficiency are also required.

Types of Crops

KharifRabi
Crops that are sown during the monsoon. Example: Paddy, maizeCrops that are sown after the monsoon. Example: Mustard, potato

Agricultural Practices

Practices used to cultivate crops are called agricultural practices.

  • 1. Preparation of Soil
  • 2. Sowing seeds
  • 3. Manure and Fertilizers
  • 4. Irrigation
  • 5. Weeding
  • 6. Crop protection
  • 7. Harvesting
  • 8. Preservation and storage

Crop

Crop variety improvementCrop production improvementCrop protection improvement
FactorsFactorsFactors
1. Higher yield1. Nutrient management1. Protection in field
2. Biotic and Abiotic resistanceManure2. protection during storage
3. Improved varietyFertilizerBiotic
Genetically Modified Crops (GMC)2. IrrigationAbiotic
HybridizationWells
Inter-specific (between different species)Rivers
Inter-generic (between different genera)Life system
Inter-varietal (between different varities)3. Cropping patterns
4. Wider adeptabilityInter Cropping
Mixed Cropping
Crop Rotation

Manure

The organic substances obtained from decomposition of plant and animal wastes.

Fertilizers

The chemical substances rich in nutrients.

Difference Between Fertilizer And Manure

FertilizerManure
Inorganic saltNatural substance
Chemical substanceOrganic substance
Prepared in factoriesPrepared in fields
Does not humidify the soilProvides humus to the soil
Rich in plant nutrientsLess rich in plan nutrients

Animal Husbandry

In agriculture, animal husbandry is a special field that deals with rising of the livestock in a controlled, selective environment by providing  them with the right care so that they can stay healthy and disease free.