Question

Fertilizers help farmers to obtain better yield of crop but the use of chemical fertilizer is not encouraged

Answer 1

their use is not encouraged because 
(1) they change the chemical composition of soil
(2)sometimes they flow and mix with water and pollute it

Answer 2

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Fertilizers➫ A chemical or natural substance added to soil or land to increase its fertility.

Manure➫ A fertilizer made from animal waste.

➧ It better to use compost than chemical fertilizers because:-
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❱ It is easier to prepare.
❱ It is environment friendly.
❱ It is cheap.
❱ It less harmful.

➧ Disadvantage of Fertilizers:-
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❱ It leads to eutrophication.

❱ It effects on waterways caused by chemical run off of the excess fertilizer. 

❱ They grow plants but do nothing to sustain the soil.

❱ It can cause:-

♦ Cardiac Disease
♦ Several Cancers
♦ Respiratory Ailments

➧ Types of Fertilizers are:-
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[1] Complete inorganic fertilizers:-

❱ These types of inorganic fertilizers contain all three major macronutrients:-

♦ Nitrogen (N)
♦ Phosphorous (P)
♦ Potassium (K)

[2] Special purpose fertilizer:-

❱ These types of fertilizer are formulated especially to target certain plants' requirements or certain soil deficiencies.

➧ Benefits of Compost & Chemical Fertilizers:-
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❱ It helps to decontaminate soil.

❱ They improve the structure of the soil.

❱ They increase soil ability to hold water & nutrients.

❱ They provide a healthy medium for plant growth.

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