Class 12 Biology Environmental Issues Agro-chemicals and their effects

 

  • The chemicals which are used in agriculture are called agro-chemicals. Example- herbicides, fungicides, pesticides.
  • Increasing amounts of artificial fertilizers can cause eutrophication.
  • Integrated organic farming is a cyclical zero-waste procedure where waste products from one process are cycled in as nutrients for other processes.

Examples-

  1. Cattle excreta (dung) are used as manure.
  2. Crop waste is used to create compost, which can be used as a natural fertilizer or can be used to generate natural gas.

Class_12_Biology_Environmental_Issues_Cattle_Dung

Fig. cattle dung used as manure

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