MP Board · Class 9 · Science · Improvement in Food ResourcesExplain the differences between Manures and Fertilizers. Discuss their advantages, disadvantages, and long-term effects on soil fertility and environmental health.
Step-by-Step Solution
Difference Between Manures and Fertilizers
| Feature | Manure | Fertilizer |
|---|---|---|
| Origin | Natural substance derived from decomposed organic matter. | Inorganic salts or chemical compounds manufactured in factories. |
| Nutrient Content | Contains low concentrations of plant nutrients. | Rich in specific plant nutrients like N, P, and K. |
| Humus | Adds a lot of organic matter (humus) to the soil. | Does not add any humus to the soil. |
| Absorption | Slowly absorbed by plants as it is not easily soluble. | Readily absorbed by plants as it is water-soluble. |
Advantages and Disadvantages of Manures
- Advantages:
- Soil Texture: Improves soil structure, water-retaining capacity in sandy soils, and aeration in clayey soils.
- Eco-friendly: Prevents environmental pollution and recycles farm wastes.
- Disadvantages:
- Less nutrient-specific and required in bulk quantities, making transport and storage difficult.
Advantages and Disadvantages of Fertilizers
- Advantages:
- High nutrient concentration ensures rapid plant growth and high crop yields.
- Easy to transport, store, and apply accurately.
- Disadvantages:
- Soil Degradation: Overuse destroys soil texture and kills soil microorganisms.
- Water Pollution: Excessive fertilizers wash into water bodies causing eutrophication.
💡 Study Guide: This question tests core syllabus concepts from Improvement in Food Resources. For formulas, key summaries, and mock exam reference guides, read the full Improvement in Food Resources Revision Notes.