Question
Explain about the varieties of coal.
✓
Answer
Depending upon the amount of carbon content, coal may be of four types:
Peat: This is the most inferior and softest form of coal. Its carbon content is very low. It has a large amount of moisture and is not much suitable to be used as fuel.
Lignite: Lignite is comparatively harder than peat, but still is very soft. Its carbon content is more than that of peat.
Bituminous: Its carbon content is higher, as it is free from moisture and other impurities.
Anthracite: This is the highest grade coal. This is also known as hard coal. It has maximum amount of carbon. It produces a very little smoke.
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Given below is a conversation between two farmers Heera and Beera.
Heera: Brother Beera, your maize crops looks beautiful! They have grown pretty fast.
Beera: Yes, I have sprayed urea this time. What about you?
Heera: Well, I am still relying on good old cow dung. I am saving money for buying a tractor.
Beera: That’s good. Tractor saves a lot of time and labour.
Heera: Yes, it’s been very labour intensive for me and now these weeds have come up.
Beera: Try weedicides, they are very effective. Now answer the following questions.
$i.$ List the practices which are not environment friendly and why?
$ii.$ What is the advantage of modern agriculture implements over traditional ones?
$iii.$ Name one weedicide and the precaution farmers must take during its application.
→→Heera: Brother Beera, your maize crops looks beautiful! They have grown pretty fast.
Beera: Yes, I have sprayed urea this time. What about you?
Heera: Well, I am still relying on good old cow dung. I am saving money for buying a tractor.
Beera: That’s good. Tractor saves a lot of time and labour.
Heera: Yes, it’s been very labour intensive for me and now these weeds have come up.
Beera: Try weedicides, they are very effective. Now answer the following questions.
$i.$ List the practices which are not environment friendly and why?
$ii.$ What is the advantage of modern agriculture implements over traditional ones?
$iii.$ Name one weedicide and the precaution farmers must take during its application.
