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manures & fertilizers


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Presentation on Manures & Fertilizers

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manures & fertilizers

  2. 2. MANURE • Nutrients are added to soil for healthy growth of plants. • Continuous growing of crops makes the soil poor in nutrients. • Manures are organic substances obtained from decomposition of plant and animal wastes. • Manuring is done to replenish soil with nutrients.
  4. 4. TRACTOR MANURING THE FIELD  Tractors are used for manuring fields.
  5. 5. ADVANTAGES OF MANURING • Improves water retaining capacity of the soil. • Makes the soil porous and exchange of gases becomes easy. • Increases the number of friendly microbes . • Improves the texture of the soil. • Replenishes the soil with necessary nutrients.
  6. 6. FERTILIZERS • Chemical substances rich in nutrients. • Produced in factories.
  7. 7. E.g.:-
  8. 8. NITROGEN PHOSPHORUS POTASSIUM Green Foliage Strong Roots Healthy Growth N P K
  9. 9. • Help farmers to get better yield of crops. DISADVANTAGES OF FERTILIZERS 1. Source of water pollution. 2. Made the soil less fertile. 3. Artificial fertilizers often cause diseases. ADVANTAGES OF FERTILIZERS
  10. 10. DIFFERENCES FERTILIZER MANURE Inorganic salt Natural substance Chemical substance Organic substance Prepared in factories Prepared in fields Does not humidify the soil Provides humus to the soil Rich in plant nutrients Less rich in plant nutrients
  11. 11. CONCLUSION • Manure: organic substances obtained from the decomposition of plant and animal wastes. • Adding manure to the field shall replenish the soil with nutrients. • Manuring results in stronger plants and better crops. • Fertilizers are chemical substances.