FARMING PRATICES

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FARMING PRATICES

• FERTILIZATION

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Water from rainfall washes away a lot of mineral
elements from the topsoil (leaching).
Also intensive cropping removes nutrients from
the soil.

• Crops cannot grow without nutrients so
  fertilization is necessary.

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Plant growth and development depend on mineral
elements

• NITROGEN, PHOSPHORUS, POTASSIUM are the most
  important elements.
• Plants also need small quantities of elements
  (trace elements) iron, sulphur, manganese,
  copper. zinc.

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Fertilizers are substances added to the soil to
replace nutrients.

• Organic fertilizers improve the physical and
  biological properties of the soil.
• Chemical synthetic fertilizers greatly increase
  crop yields. However, chemical fertilizers are
  not good for the environment.

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ORGANIC FERTILIZATION

• Fermyard manure (dung) is animal waste.
• Green manure consists in ploughing leguminous
  crops under the soil.
• Compost is a mixture of leaves, prunings and
  grass mowing residues from gardening.

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CHEMICAL SYNTHETIC FERTILIZERS are manufactured
by industry. They are available in liquid,
powdery and granular forms.