Sunday, 19 February 2012

5.3 Fertilisers

The use of fertiliser to increase crop yield


We can increase the growth of plants in farming by the application of fertilizers to the soil which are forms of nitrate and phosphate, or combination of both.

These compounds go down into the soil and are taken up from the root structure and move in the transpiration stream up to the leave and used in the leaf for the constructions.
Examples : Nitrate will go and forms proteins, Phosphate will go forms DNA and membrane structure 

They are 2 fertilizers:
Organic: 
  • Are produced from animal waste from farm - take form from cow's feaces collected by the farmers
  •  Through the process of decomposition and fermentation and form a substance known as slurry. 
  • This gives crop plant a supply of nitrate and phosphate to promote growth. 
Artificial :
  • Take the forms of chemicals :Potassium nitrate and Ammonium nitrate
  • Apply to the field, they will go into solution in the soil water. 
  • This will release nitrate and promote growth in the same way as it would do at the compound. 

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