Science
Compare the use of manure and fertilizers in maintaining soil fertility.
Food Production
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Answer
| Manure | Fertilizers |
|---|---|
| Consists of large quantity of organic matter. | Consists of compounds containing nutrient and no organic matter. |
| Supplies small quantities of nutrients to the soil. | Supplies large quantity of nutrient to the soil. |
| Prepared by the decomposition of animal excreta and plant waste; some times green plants. | Commercially produced plant nutrients. |
| The bulk of organic matter in manure helps in improving the soil structure, water holding capacity and fertility. | It can hamper soil structure and fertility if not used in optimum amount. |
| They do not affect pH of soil. | They can make the soil acidic or alkaline. |
| They do not cause pollution. | They cause air pollution during their manufacture and water pollution when used excessively in fields. |
| Examples: Compost, Green manure | Example: Urea, SSP |
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