Bissoy.com
Doctors Medicines MCQs Q&A

A farmer in a semi-arid area claims that his farming practice is very environment friendly. Which of the following practices on his farm can justify his claim? 1. Planning a tree belt. 2. Practising crop rotation. 3. Carrying out a large scale irrigation system 4. Using organic fertilizers. Select the correct answer using the code given below:

A farmer in a semi-arid area claims that his farming practice is very environment friendly. Which of the following practices on his farm can justify his claim? 1. Planning a tree belt. 2. Practising crop rotation. 3. Carrying out a large scale irrigation system 4. Using organic fertilizers. Select the correct answer using the code given below: Correct Answer 1, 2 and 4

The correct option is 2 i.e statements ​1, 2 and 4 are correct.

  • Semi arid regions are the region which borders the deserts. It is also called as steppes type of climate.
    • The major threats to soils in these regions are soil erosion, salinity, and degradation due to human activities. Hence, tree belt planning and crop rotation is required to prevent erosion and maintain salinity and fertility of soil. Hence, statements 1 and 2 are correct.
    • Due to human activities there is decline in soil structure and a resultant loss of soil water storage and quality. So organic fertilizers are used to maintain the soil constituents balanced. Hence, statement 4 is correct.
    • Water is scarce in these regions. Therefore, for watering crops irrigation system is required. But instead of using extensive irrigation system, sustainable agriculture practices like drip irrigation would make it more environment friendly.
    • Use of large scale irrigation may lead to increased salinity of soil, and also more extraction of groundwater. Hence, Statement 3 is NOT correct.

Related Questions

How is permaculture farming different from conventional chemical farming? 1. Permaculture farming discourages monocultural practices but in conventional chemical farming, monoculture practices are predominant. 2. Conventional chemical farming can cause an increase in soil salinity but the occurrence of such phenomenon is not observed in permaculture farming. 3. Conventional chemical farming is easily possible in semi-arid regions but permaculture farming is not so easily possible in such regions. 4. Practice of mulching is very important in permaculture farming but not necessarily so conventional chemical farming Select the correct answer using the code given below.  
If farmers want to improve their yield, they must use organic fertilizers in place of chemical fertilizers. Assumptions: I.Chemical fertilizers have certain ill effects on health II.Chemical fertilizers do not produce as much yield as the organic fertilizers.
If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irrigation is in the areas with impervious surface layers. 3. Well irrigation requires sufficient groundwater reserves. 4. Other forms of irrigation are not available. Select the correct answer using the code given below.
If one plots the tank irrigation in India and superimposes it with map of well irrigation,one may find that the two are negatively related. Which of the following statements explain the phenomenon?1. Tank irrigation predates well irrigation.2. Tank irrigation is in the areas with impervioussurface layers.3. Well irrigation requires sufficientground water reserves.4. Other forms of irrigation are not available.Select the correct answer using the code given below.
In the following question, there are six parts marked S1, S6, P, Q, R and S. The position of S1 and S6 are fixed. Some parts of the sentence have been jumbled up. Rearrange these parts and choose the proper sequence from the given options. (S1) Once upon a time, there lived a farmer in a village, beside a forest. (P) When the farmer was a little boy, he spent much of his time playing with the apple tree (Q) Those days, the apple tree had given the choicest of apples to him (R) However, as time passed, the apple tree became old and stopped bearing fruits (S) He had a big garden that had an old apple tree and other plants, trees and beautiful flowers (S6) Now that the farmer was not getting any apples from the tree, he decided that the tree was useless and cut it.
In the following question, there are six parts marked S1, S6, P, Q, R and S.The position of S1 and S6 are fixed. Some parts of the sentence have been jumbled up. Rearrange these parts and choose the proper sequence from the given options. (S1) Once upon a time, there lived a farmer in a village, beside a forest. (P) When the farmer was a little boy, he spent much of his time playing with the apple tree (Q)Those days, the apple tree had given the choicest of apples to him (R) However, as time passed, the apple tree became old and stopped bearing fruits (S)He had a big garden that had an old apple tree and other plants, trees and beautiful flowers (S6) Now that the farmer was not getting any apples from the tree, he decided that the tree was useless and cut it.
1996-7 and 2002-3, the area under canal irrigation declined by 2.4 million ha (13.8 percent), the area under tank irrigation fell by 1.4 million ha (42.4 percent), and the area irrigate by all other sources declined by 1 million ha (28 percent). The only irrigation source that increased its share was groundwater wells, by 2.8 million ha (more than 9 percent) Why has such a change in irrigation demands happened? 1. Not enough supply of water from canals 2. More tubewell irrigation by farmers in the source areas of rivers 3. High cost of irrigation water, and  diversion for non-farm use 4. Joint use of water not possible due to social and economic inequalities
Which of the following sentence is/are correct about crop rotation? 1. Crop rotation helps return nutrients to the soil without synthetic inputs. 2. Crop rotation is the pratice of planting different crop sequentially on the same plot of land to improve soil health. 3. Crop rotation deteriorates the soil structure as same nutrients are used time and time again.
Read the following passage and answer the item that follows. Your answers to this item should be based on the passage only. Many farmers use synthetic pesticides to kill infesting insects. The consumption of pesticides in some of the developed countries is touching 3000 grams/hectare. Unfortunately, there are reports that these compounds possess inherent toxicities that endanger the health of the farm operators, consumers and the environment. Synthetic pesticides are generally persistent in environment. Entering in food chain they destroy the microbial diversity and cause ecological imbalance. Their indiscriminate use has resulted in development of resistance among insects to insecticides, upsetting of balance in nature and resources of treated populations. Natural pest control using the botanical pesticides is safer to the user and the environment because they break down into harmless compounds within hours or days in the presence of sunlight. Plants with pesticidal properties have been in nature for millions of years without any ill or adverse effects on the ecosystem. They are easily decomposed by many microbes common in most soils. They help in the maintenance of biological diversity of predators and human health hazards. Botanical pesticides formulated from plants are biodegradable and their use in crop protection is a practical sustainable alternative. Which of the following statements is/are correct regarding biopesticides? 1. They are not hazardous to human health. 2. They are persistent in environment. 3. They are essential to maintain the biodiversity of any ecosystem. Select the correct answer using the code given below.
In the following question, two columns are given containing three phrases each. In the first column, phrases are A, B, and C and in the second column, the phrases are D, E and F. A phrase from the first column may or may not connect with a phrase from the second column to make a grammatically and contextually correct sentence. There are five options, four of which display the sequence(s) in which the phrases can be joined to form a grammatically and contextually correct sentence. If, none of the options given forms a correct sentence after combination, select 'None of these' as your answer. Column (1) Column (2) (A) An important point that the Survey makes is that of the Indian economy (D) based on naturally occurring biological processes. (B) Tree Plantation drives combat many environmental issues like deforestation, erosion of soil, desertification in semi-arid areas, global warming and hence (E)recovering during the second half of this year. (C) Organic farming methods combine scientific knowledge of ecology and some modern technology with traditional farming practices (F) enhancing the balance of the environment.