Home | | Science 6th Std | Fertilizers

Chemistry in Everyday life | Term 3 Unit 3 | 6th Science - Fertilizers | 6th Science : Term 3 Unit 3 : Chemistry in Everyday life

Chapter: 6th Science : Term 3 Unit 3 : Chemistry in Everyday life

Fertilizers

Apart from water, sunlight and air, certain nutrients are also needed for the growth of plants. We know that the plants get their nutrients from the soil.

Fertilizers

Apart from water, sunlight and air, certain nutrients are also needed for the growth of plants. We know that the plants get their nutrients from the soil.

Nitrogen (N), Phosphorous (P) and Potassium (K) are the three important nutrients among the various nutrients needed for the growth of plants. These three are called as Principal Nutrients.

The table given below depicts the quantity of elements absorbed by certain common plants.


 

* What would happen to the nutrient content of the soil, if the field is farmed continuously? 

________________________________________

* How could we resend these nutrients back to the soil?

________________________________________

Fertilizers are organic or inorganic materials that we add to the soil to provide one or more nutrients to the soil.

Fertilizers given to plants can be classified into two. They are organic and inorganic fertilizers.

 

Organic fertilizers

Fertilizers containing only plant or animal-based materials or those synthesized by micro-organisms are called organic fertilizers.

These fertilizers can be prepared easily. This type of fertilizers are economical. (e.g)

Vermi compost, compost.


 

Inorganic fertilizers

The fertilizers prepared by using natural elements by making them undergo chemical changes in the factories are called inorganic fertilizers. (e.g) Urea, Ammonium sulphate and Super phosphate.

The table given below lists the nutrients in inorganic fertilizers


If we use 50 kg of urea, then according to the table, 23 kg of nitrogen (46 percent) will be added to the soil.

* The percentage of nitrogen in ammonium sulphate is 21%

* If 50 kg of potassium nitrate is added to soil, how much potassium would the soil get? 22 kg


Earthworms take organic wastes as food and produce compost castings. So earthworms are known as Farmers' friends because of the multitude of services they provide to improve soil health and consequently plant health.


 

Activity 4: Make a visit to agriculture field in your area. List out the various crops and type of fertilizers used there.


 

Tags : Chemistry in Everyday life | Term 3 Unit 3 | 6th Science , 6th Science : Term 3 Unit 3 : Chemistry in Everyday life
Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
6th Science : Term 3 Unit 3 : Chemistry in Everyday life : Fertilizers | Chemistry in Everyday life | Term 3 Unit 3 | 6th Science


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.