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Summary

  • The first and foremost aim in plant breeding is to create useful varieties of crops
     
  • Photoperiods are related to the duration of sunlight..
     
  • The breeding, feeding and caring of livestock for food and other useful purposes is called animal husbandry.
     
  • Cattle are classified as 1. Dairy breeds, 2. Draught breeds and 3. Dual breeds.
     
  • Poultry farming requires less capital investment and at the same time it has the added advantage of ensuring quick returns.
     
  • The Italian bees have high honey production capacity.
     
  • The phenomenon where the O2 content of an aquatic habitat is reduced to such an extent as to cause death of organisms is called eutrophication.
     
  • Large-scale, systematic watering of crops in the field is called irrigation.
     
  • The growing of different crops on a piece of land in a pre-planned succession is known as crop rotation.
     
    • Pesticides are fungicides and insecticides and yet other specific chemicals that destroy plant pests .






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