Question
How can slash and burn agriculture become environment friendly?

Answer

Slash and bum agriculture, commonly called as Jhum cultivation in the north-eastern states of India, has also contributed to deforestation. In slash and bum agriculture, the farmers cut down the trees of the forest and bum the plant remains. The ash is used as a fertilizer and the land is then used for farming or cattle grazing. After cultivation, the area is left for several years so as to allow its recovery. The farmers then move on to other areas and repeat this process. In earlier days, when Jhum cultivation was in prevalence, enough time-gap was given such that the land recovered from the effect of cultivation. With increasing population, and Treated cultivation, this recovery phase is done away with, resulting in deforestation.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Explain double fertilisation and trace the post-fertilisation events in sequential order leading to seed formation in a typical dicotyledonous plant.
Describe the beneficial activities of bacteria. ###How can we say that bacteria are our friends? Explain.
DNA separated from one cell, when introduced in another cell, is able to bestow some of the properties of the former to the latter. What is this change called in technical terms? Describe the experiment evidences which led to the discovery of the above phenomenon.
  1. What is meant by ecological succession? How does it occur? Explain.
  2. Differentiate between Primary and Secondary succession.
A person in your colony has recently been diagnosed with AIDS. People/residents in the colony want him to leave the colony for the fear of spread of AIDS.
  1. Write your view on the situation, giving reasons.
  2. List the possible preventive measures that you would suggest to the residents of your locality in a meeting organised by you so that they understand the situation.
  3. Write the symptoms and the causative agent of AIDS.
List three strategies that a bisexual chasmogamous flower can evolve to prevent self pollination (autogamy).
Describe the ill-effects of alcohol on different parts of a body of an individual.
Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below:
S. No.
Syndrome
Cause
Characteristics of affected individuals
SexMale/ Female/ Both
1.
Down’s
Trisomy of 21
‘a’-
(i)
(ii)
‘b’
2.
‘c’
XXY
Overall masculinedevelopment.
‘d’
3.
Turner’s
45 with XO
‘e’-
(i)
(ii)
‘f’
Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage upto its ovulation. Name the hormones involved in this process.OR
When does oogenesis start in humans? Name the three hormones and their sources, linked with oogenesis. How do they influence the process of oogenesis? Explain.
Observe the set of 4 figures A, B, C and D and, answer the following questions,
  1. Which one of the figures shows mutualism?
  2. What kind of association is shown in D?
  3. Name the organisms and the association in C.
  4. What role is the insect performing in B?
​​​​​​​