Q. 544.6( 10 Votes )
What is a fertilizer ? Name any two fertilizers. State two harmful effects caused by the excessive use of fertilizers.
Fertilisers are chemical substances which are rich in a particular nutrient. Some examples of fertilizers are urea, potash, NPK (nitrogen, phosphorus, potassium), etc.
Harmful effects caused by the excessive use of fertilizers are-
(i) Excessive use of fertilizers makes the soil less fertile.
(ii) Excessive use of fertilizers causes water pollution.
Rate this question :
Define manure. What are the advantages of manure ?Lakhmir Singh & Manjit Kaur - Science
Explain how, soil gets affected by the repeated growing of croping the same fields. How does use of fertilizers help the farmers ?Lakhmir Singh & Manjit Kaur - Science
The Rhizobium bacteria present in the root nodules of pea plants can fix one of the following from the atmosphere. This one is:Lakhmir Singh & Manjit Kaur - Science
Which of the following cannot be provided to the soil by a chemical fertilizer?Lakhmir Singh & Manjit Kaur - Science
The plants grow fastest if we add fertilisers in the soil, but if we add manure, plants grow but at a slower rate. Give reason.All in One - Science
Does nitrogen fixation help in nutrient enrichment?All in One - Science
Organic foods are harmless. Do you agree?All in One - Science
A farmer was growing only paddy in a particular field for five successive generations. He found that the yield decreases every time. Give reasons and how can this problem be solved?All in One - Science
The use of fertilisers should be limited. Why?All in One - Science