5. Explain how fertilisers are different from manure.
6. What is irrigation? Describe two methods of irrigation which conserve
happen?
Answers
Answer:
fertilizer are chemical made ,manure is natural
Explanation:
fertilizer cotains of chemical which is used for crops and which are dangerous like KOH, uriea etc
but manure is naturally made which is not harmful for crops like cow dung
Explanation:
5.)Explain how fertilisers are different from manures.
Ans. (i) Manures are organic substances while fertilisers are chemical substances.
(ii) Manures are prepared in fields while fertilisers are prepared in factories.
(iii) Manures contain all the nutrients while fertilisers are rich in certain nutrients.
(iv) Manures provide humus while fertilisers do not provide any humus.
6.)The artificial method of watering the plants for assisting in their growth is called irrigation.
Main sources of irrigation are wells, tube-wells, ponds, lakes, rivers.
Two methods which help us to conserve water are:
Sprinkler irrigation system: this irrigation has an arrangement of vertical pipes with rotating nozzles on the top. It is more useful in the uneven and sandy land where sufficient water is not available.
Drip irrigation system: this irrigation system has an arrangement of pipes or tubes with very small holes in them to water plants drop by drop just at the base of the root. It is very efficient as water is not wasted at all.