← Agri & Allied (CT)
Past Questions — 2024
What is the disc angle of a good plough?
A)
35-38°
B)
42-45°
C)
54-57°
D)
59-62°
In farm machinery, the 'disc angle' (also known as the disc tilt angle) refers to the angle the disc makes with the vertical plane. This angle is critical for the penetration of the disc into the soil and the efficiency of the soil inversion. For a standard disc plough, the ideal disc angle typically ranges between 42° and 45°.
1. If the angle is too small (e.g., 35-38°), the disc will not penetrate the soil deeply enough and will tend to slide over the surface.
2. If the angle is too large (e.g., 54° or above), the draft requirement increases significantly, leading to higher fuel consumption and excessive wear and tear on the machinery.
3. The range of 42-45° provides the optimal balance between soil penetration, inversion efficiency, and draft force.
As ofrecent estimates, the average farm power availability in India is approximately
A)
1.2kW/ha
B)
2.5 kW/ha
C)
5.0kW/ha
D)
6.5 kW/ha+
Farm power availability is a critical indicator of the level of mechanization in agriculture. In India, the average farm power availability has grown slowly over the decades. According to data from the Ministry of Agriculture and Farmers Welfare and various agricultural engineering reports, the average farm power availability in India is estimated to be around 1.2 to 1.5 kW/ha. While there are regional variations (with states like Punjab and Haryana having much higher values), the national average remains low compared to developed nations. Option (a) 1.2 kW/ha aligns with these official estimates. Options (b), (c), and (d) represent significantly higher levels of mechanization that are not reflective of the current national average in India.
Which of the following best differentiates monitoring from evaluation?
A)
Monitoring is done at the end ofa project, while evaluation is continuous.
B)
Monitoring tracks ongoing activities, while evaluation assesses the overall impact.
C)
Monitoring only focuses on financial data, while evaluation is holistic.
D)
Monitoring is for stakeholders, while evaluation is for funders only.
In Extension Education and Project Management, monitoring and evaluation (M&E) are distinct but complementary processes:
1. **Monitoring** is a continuous, systematic process of collecting data on specified indicators to provide management and stakeholders with indications of the extent of progress and achievement of objectives. It focuses on the 'how' and 'what' of ongoing activities (inputs and outputs).
2. **Evaluation** is a periodic or terminal assessment of an ongoing or completed project. It focuses on the 'why' and 'so what,' assessing the effectiveness, efficiency, sustainability, and overall impact (outcomes) of the intervention.
Analysis of options:
- **Option a** is incorrect because it reverses the definitions; monitoring is continuous, while evaluation is typically periodic or terminal.
- **Option b** is correct as it accurately captures the temporal and functional difference (ongoing tracking vs. impact assessment).
- **Option c** is incorrect because monitoring covers a wide range of indicators (technical, social, and physical), not just financial data.
- **Option d** is incorrect because both monitoring and evaluation reports are used by a variety of stakeholders, including project managers, funders, and the community.
At the adoption stage, information source is-
A)
Village level change agent and to some extent mass media
B)
Extension agency and other farmer
C)
Informal person source including family members
D)
Self-experience gained at trial stage
In the process of adoption (the mental process an individual goes through from first hearing about an innovation to final adoption), there are typically five stages: Awareness, Interest, Evaluation, Trial, and Adoption.
1. Awareness: Information comes from mass media or change agents.
2. Interest: Information comes from more detailed sources or extension agents.
3. Evaluation: The individual mentally weighs the pros and cons.
4. Trial: The individual tests the innovation on a small scale.
5. Adoption: The individual decides to make full use of the innovation.
At the final 'Adoption' stage, the decision is based primarily on the results of the 'Trial' stage. Therefore, the most critical information source for the final decision to adopt is the individual's own self-experience gained during the trial. While other sources influence the earlier stages, the transition from trial to adoption is driven by the success of the personal experiment.
To show relative worth of a new practice over an old one, the extension method best suited to-
A)
Method demonstration
B)
Training
C)
Result demonstration
D)
Group demonstration
In Extension Education, different demonstration methods are used depending on the objective:
1. **Result Demonstration**: This is specifically designed to prove the superiority of a new practice, variety, or technology over the existing one. It involves comparing the 'new' versus the 'old' (control) under similar conditions over a full cycle (e.g., a growing season) to show the tangible 'result' (e.g., higher yield). Therefore, it is the best method to show 'relative worth'.
2. **Method Demonstration**: This is used to teach a skill or 'how to do' something (e.g., how to treat seeds or how to calibrate a sprayer). It focuses on the process, not the final comparative outcome.
3. **Training**: This is a broader educational process aimed at improving skills and knowledge, often involving a curriculum, rather than a specific comparative demonstration of a practice.
4. **Group Demonstration**: This is a general term for demonstrating something to a group, but it does not inherently imply the comparative analysis of relative worth between an old and new practice.
Since the question specifically asks for the 'relative worth' (comparison of outcomes), Result Demonstration is the correct choice.
Which of the following is a core principle of Extension Education?
A)
Top-down approach to planning
B)
Emphasis on passive learning
C)
Encouragement of participatory learning and involvement
D)
Focus on urban populations
Extension Education is based on the philosophy of 'helping people to help themselves.' Its core principles emphasize democratic processes, learner-centered approaches, and the active participation of the target group (usually farmers) in the learning process.
- Option (c) is correct because participatory learning ensures that the solutions provided are culturally acceptable, locally relevant, and sustainable, as the beneficiaries are involved in the planning and implementation.
- Option (a) is incorrect because Extension Education advocates for a 'bottom-up' approach rather than a 'top-down' approach to ensure the needs of the grassroots level are met.
- Option (b) is incorrect because Extension is based on 'learning by doing' (active learning), not passive learning.
- Option (d) is incorrect because, while extension can be applied to various fields, its primary traditional focus in the context of Agriculture & Allied Services is rural populations and farmers.
Ina seed-cum-fertilizer drill, the function of the fluted roller mechanism is to-
A)
Regulate seed and fertilizer rate
B)
Break soil clods
C)
Level the seedbed
D)
Spray fertilizers
In a seed-cum-fertilizer drill, the fluted roller is a metering device used to control the quantity of seeds or fertilizer delivered to the furrow. It consists of a cylinder with longitudinal grooves (flutes) that pick up a specific volume of material from the hopper and deliver it to the seed tube. By adjusting the speed of the roller (via gear ratios or variable speed drives) or changing the roller size, the operator can precisely regulate the sowing and fertilization rate per unit area.
Why other options are incorrect:
- Option b (Break soil clods): This is the function of primary tillage implements like harrows or plows.
- Option c (Level the seedbed): This is the function of land levelers or rollers located at the rear of the machine.
- Option d (Spray fertilizers): Fertilizers in a drill are typically applied in granular form; spraying is the function of a sprayer, not a fluted roller mechanism.
The materials that is left by the harvesting machine in row is called-
A)
Swath
B)
Stubble
C)
Straw
D)
Residue
In farm machinery and harvesting operations, a 'swath' refers to the row of cut crop material (stems, leaves, and grain) that is deposited on the ground by a harvester, mower, or windrower. The purpose of creating a swath is to allow the material to dry (cure) before it is picked up by a baler or combine harvester.
Why other options are incorrect:
- b. Stubble: This refers to the lower part of the crop stem that remains rooted in the soil after the crop has been harvested.
- c. Straw: This is the dry stalk of cereal plants after the grain has been removed; while a swath contains straw, 'straw' describes the material itself, not the row left by the machine.
- d. Residue: This is a general term for all organic material left in the field after harvest (including stubble and straw), but it does not specifically describe the 'row' formation.
Vertical suction of a plough influences-
A)
Pulverization
B)
Width of cut
C)
Depth of cut
D)
Direction of pull
In plough design, 'suction' refers to the tendency of the plough to be pulled deeper into the soil during operation. Vertical suction is specifically the component of the resultant force acting downwards. This force is created by the curvature of the mouldboard and the angle of the share; as the soil is displaced, the reaction force from the soil pushes the plough point deeper into the ground. Therefore, vertical suction directly influences the depth of cut.
Why other options are incorrect:
- Pulverization (a) is primarily influenced by the curvature and twist of the mouldboard (scouring and crumbling action).
- Width of cut (b) is determined by the physical width of the share and the mouldboard.
- Direction of pull (d) is influenced by the lateral suction (horizontal component) and the overall alignment of the implement, rather than the vertical suction component.
ABC of posters mean-
A)
Attractive, Briefand Complete
B)
Attractive, Briefand Clear
C)
Attractive, Briefand Creative
D)
Accurate, Bold and Concise
In Extension Education, a poster is a visual communication tool used to convey a specific message to a target audience quickly. To be effective, posters follow the 'ABC' rule:
1. **Attractive**: It must catch the eye of the viewer using colors, images, and layout to ensure the person stops to read it.
2. **Brief**: Since people usually view posters while passing by, the text must be concise and to the point, avoiding long paragraphs.
3. **Complete**: Despite being brief, the poster must contain all the essential information (the 'what', 'where', 'when', and 'why') so that the viewer is not left with unanswered questions.
Comparing the options:
- Option (b) 'Clear' is important, but 'Complete' is the standard pedagogical term used in the ABC of posters to ensure the message is self-contained.
- Option (c) 'Creative' is a quality of design, but not the core requirement of the ABC mnemonic.
- Option (d) 'Accurate, Bold and Concise' describes good traits, but does not follow the established 'ABC' mnemonic used in agricultural extension literature.
The term ecosystem was proposed by-
A)
A.V. Lecuwenhock
B)
A.GTansley
C)
E. Hartigan
D)
E.J.Butler
The term 'ecosystem' was coined by the British botanist Arthur George Tansley (A.G. Tansley) in 1935. He defined it as a system integrating the biotic (living) community and the abiotic (non-living) environment, emphasizing that the two are inextricably linked and function as a single unit.
Analysis of other options:
- A.V. Leeuwenhoek (often misspelled as Lecuwenhock) is known as the 'Father of Microbiology' for his early observations of microorganisms using a microscope.
- E. Hartigan and E.J. Butler are not recognized as the originators of the term 'ecosystem' in ecological literature.
The diversity within a particular area or ecosystem and is usually expressed by the number of species in that ecosystem is-
A)
Genetic biodiversity
B)
Species biodiversity
C)
Alpha biodiversity
D)
Beta biodiversity
The question describes the concept of diversity within a single, particular area or ecosystem, specifically measured by the number of species present. This is the definition of Alpha Diversity.
Step-by-step breakdown:
1. **Alpha Diversity (α-diversity)**: This refers to the local diversity. It is the number of species (species richness) found within a single community, ecosystem, or a specific sample area.
2. **Beta Diversity (β-diversity)**: This refers to the comparison of diversity between two or more ecosystems. It measures the rate of change in species composition as one moves from one community to another.
3. **Gamma Diversity (γ-diversity)**: This is the total diversity of a large region (the sum of alpha and beta diversities).
4. **Genetic Biodiversity**: This refers to the variation of genes within a single species, not the number of different species in an area.
5. **Species Biodiversity**: While this is a general term for the variety of species, the specific ecological term for diversity 'within a particular area' as a metric of richness is 'Alpha biodiversity'.
Therefore, option (c) is the most precise technical term for the description provided.
A production function with unitary elasticity indicates-
A)
Increasing returns
B)
Decreasing returns
C)
Nothing
D)
Constant returns
In agricultural economics and production theory, the elasticity of production (Ep) measures the responsiveness of output to a change in the input. It is defined as the percentage change in output divided by the percentage change in input.
1. Unitary Elasticity (Ep = 1): When the elasticity is exactly 1, it means a 1% increase in input leads to exactly a 1% increase in output. This indicates 'Constant Returns to Scale' (or constant returns), where the output increases in direct proportion to the input.
2. Increasing Returns (Ep > 1): When elasticity is greater than 1, a 1% increase in input leads to more than a 1% increase in output.
3. Decreasing Returns (Ep < 1): When elasticity is less than 1, a 1% increase in input leads to less than a 1% increase in output.
Therefore, unitary elasticity corresponds specifically to constant returns.
For a farming system, the best PRA exercise:
A)
Transect walk
B)
Resource mapping
C)
Timeline
D)
Chapati diagram
Participatory Rural Appraisal (PRA) is a set of approaches used to enable local people to share, enhance, and analyze their knowledge of their own situation. When analyzing a 'farming system', the goal is often to understand the relative contribution of different enterprises (crops, livestock, poultry, etc.) to the total household income or resource use.
1. **Chapati Diagram (or Pie Chart):** This is the best tool for farming systems because it visually represents the proportion of income or labor derived from various components of the farm. It allows farmers to easily illustrate the 'share' of each enterprise in the overall system, making it ideal for analyzing the economic structure of a farming system.
2. **Transect Walk (Option a):** This is used for observing land use, soil types, and biodiversity across a geographical cross-section. While useful for spatial analysis, it does not quantify the system's components.
3. **Resource Mapping (Option b):** This is used to identify the location and distribution of physical resources (water, forests, land) within a village. It is a spatial tool, not a systemic analysis tool.
4. **Timeline (Option c):** This is used to record historical events or the sequence of activities over time. It is useful for understanding trends but not for analyzing the current composition of a farming system.
Under distress sale, what is the relationship between marketed and marketable surplus for a farmer?
A)
Marketed surplus = Marketable surplus
B)
Marketed surplus > Marketable surplus
C)
Marketed surplus < Marketable surplus
D)
Marketed surplus = 0
To solve this, we must first define the two key terms in agricultural marketing:
1. Marketable Surplus: This is the portion of total production that remains after meeting the farmer's own consumption needs (family food), feed for livestock, and seed requirements for the next crop. Mathematically: Marketable Surplus = Total Production - (Home Consumption + Feed + Seed).
2. Marketed Surplus: This is the actual quantity of produce that the farmer sells in the market.
Under normal circumstances, Marketed Surplus is usually less than or equal to Marketable Surplus because farmers may store some of their surplus for future use or price speculation.
However, a 'Distress Sale' occurs when a farmer is forced to sell more than their actual surplus—often dipping into their own consumption reserves or seed stocks—due to an urgent need for cash (e.g., to repay a loan, cover a medical emergency, or pay for basic survival). In such a scenario, the farmer sells produce that was intended for home consumption, meaning the quantity sold (Marketed Surplus) exceeds the quantity that was technically available as a surplus (Marketable Surplus). Therefore, during distress sale: Marketed Surplus > Marketable Surplus.
Central Institute of Post-harvest Engineering and Technology is located in-
A)
New Delhi
B)
Punjab
C)
Gujarat
D)
Uttar Pradesh
The Central Institute of Post-Harvest Engineering and Technology (CIPHET) is a premier research institute under the Indian Council of Agricultural Research (ICAR). It is headquartered in New Delhi. The institute focuses on developing and disseminating technologies for the post-harvest management of agricultural produce to reduce losses and enhance value addition.
Analysis of options:
- a. New Delhi: Correct. This is the location of the CIPHET headquarters.
- b. Punjab: Incorrect. While Punjab has many agricultural research centers (like PAU), CIPHET is not headquartered there.
- c. Gujarat: Incorrect. Gujarat hosts various agricultural institutes, but not the central headquarters of CIPHET.
- d. Uttar Pradesh: Incorrect. Although it is a major agricultural state, the central institute is located in the national capital.
Which of the following represents the correct sequence of energy flow in an ecosystem?
A)
Producer -> Consumer — Decomposer — Sun
B)
Sun — Producer -> Consumer — Decomposer
C)
Consumer — Producer + Decomposer — Sun
D)
Decomposer —» Consumer —» Producer —» Sun
Energy flow in an ecosystem follows a unidirectional path based on the laws of thermodynamics.
1. **The Sun**: The primary source of energy for almost all ecosystems on Earth. Solar energy is captured by autotrophs.
2. **Producers**: Green plants and algae (autotrophs) convert solar energy into chemical energy (glucose) through the process of photosynthesis.
3. **Consumers**: Heterotrophs (herbivores, carnivores, and omnivores) obtain energy by consuming producers or other consumers.
4. **Decomposers**: Fungi and bacteria break down dead organic matter from all trophic levels, returning nutrients to the soil, though the energy they extract is eventually lost as heat.
Analysis of options:
- Option (a) is incorrect because it places the Sun at the end; energy originates from the Sun, not flows into it.
- Option (c) is incorrect as it suggests energy flows from consumers to producers.
- Option (d) is incorrect as it reverses the natural flow of energy.
Therefore, the sequence Sun $\rightarrow$ Producer $\rightarrow$ Consumer $\rightarrow$ Decomposer is the only scientifically accurate representation.
Inan ecological pyramid, the greatest amount of energy is typically found in which level?
A)
Producers (plants)
B)
Primary consumers (herbivores)
C)
Secondary consumers (carnivores)
D)
Decomposers
In an ecological pyramid of energy, the flow of energy follows the '10% Rule' (Lindeman's Law). This rule states that only about 10% of the energy available at one trophic level is transferred to the next higher level; the remaining 90% is lost as heat during metabolic processes (respiration) or remains unconsumed.
1. Producers (Plants): They occupy the first trophic level and capture solar energy via photosynthesis. Since they are the primary source of energy for the entire ecosystem, they possess the maximum amount of energy.
2. Primary Consumers (Herbivores): They receive only a fraction (approx. 10%) of the energy stored in the producers.
3. Secondary Consumers (Carnivores): They receive only a fraction of the energy from the primary consumers, resulting in even lower energy availability.
Because energy is lost at every step of the food chain, the energy pyramid is always upright, with the broadest base (greatest energy) at the producer level.
Which of the following practices is primarily used in quality control to ensure the safety of finished food products?
A)
Organoleptic testing to check flavor and texture
B)
Microbiological testing to detect harmful pathogens
C)
Determining the visual appeal through color matching
D)
Packaging testing to evaluate material strength
In food processing and quality control, 'safety' specifically refers to the absence of hazards that could cause illness or injury to the consumer.
1. **Microbiological testing (Option b)** is the primary tool for ensuring safety because it detects pathogens such as Salmonella, Listeria, and E. coli, which can cause foodborne illnesses. This is a critical step in HACCP (Hazard Analysis and Critical Control Points) systems.
2. **Organoleptic testing (Option a)** refers to sensory evaluation (taste, smell, texture). While important for quality and consumer acceptance, a product can taste and smell perfect while still containing dangerous levels of toxins or pathogens.
3. **Visual appeal/Color matching (Option c)** is a quality attribute related to aesthetics and standardization, not safety.
4. **Packaging testing (Option d)** ensures the integrity of the container and shelf-life stability, but it is a secondary measure. The primary safety check of the 'finished food product' itself is the detection of biological contaminants.
Which of the following plough is mainly used for breaking hard pan and for deep ploughing with less disturbance to the top layers?
A)
Disc plough
B)
Mouldboard plough
C)
Chisel plough
D)
Ridge plough
The correct answer is the Chisel plough. Here is the detailed reasoning:
1. **Chisel Plough (Correct):** This is a primary tillage implement designed specifically for 'subsoiling' or breaking the 'hard pan' (a compacted layer of soil beneath the surface). Unlike mouldboard ploughs, it does not invert the soil; instead, it fractures and loosens the soil at deeper levels while leaving the top layer relatively undisturbed. This helps in improving water infiltration and root penetration.
2. **Disc Plough (Incorrect):** These are primarily used for primary tillage in hard, dry, or stony soils and for soils with heavy trash. They cut and invert the soil, causing significant disturbance to the top layers.
3. **Mouldboard Plough (Incorrect):** This is the classic primary tillage tool used for complete inversion of the soil. It is designed to turn the soil over to bury weeds and crop residue, which causes maximum disturbance to the top layers.
4. **Ridge Plough (Incorrect):** This is used for creating ridges and furrows for planting crops (like potatoes or sugarcane) to manage drainage and aeration; it is not used for breaking deep hard pans.
Which of the following is the first step in Extension Programme Planning?
A)
Evaluation of the program
B)
Selection of teaching methods
C)
Identification of community needs
D)
Monitoring program activities
Extension Programme Planning is a systematic process used to bring about desired changes in the behavior of people. The logical sequence of steps in planning an extension program is as follows:
1. Collection of facts/Identification of community needs and resources: The first step is to analyze the current situation and identify the gaps between 'what is' and 'what should be'. Without knowing the specific needs of the community, any program would be irrelevant.
2. Analysis of the situation: Processing the collected facts to identify the core problems.
3. Setting objectives: Defining clear, measurable goals based on the identified needs.
4. Developing a plan of work: Determining the activities, timeline, and responsibilities.
5. Execution/Implementation: Putting the plan into action using various teaching methods.
6. Evaluation: Measuring the results against the objectives.
Analyzing the options:
- Option (a) Evaluation is the final step of the cycle.
- Option (b) Selection of teaching methods occurs during the planning of work or implementation phase.
- Option (d) Monitoring is a continuous process that happens during implementation to ensure the program is on track.
Therefore, the identification of community needs is the foundational first step.
The basic principle of extension education is-
A)
Learning by reading
B)
Learning by doing
C)
Learning by seeing
D)
Learning by hearing
Extension education is a non-formal educational process designed to bring about desirable changes in the knowledge, skills, and attitudes of people (primarily farmers). The fundamental philosophy of extension is based on the principle of 'Learning by Doing.' This approach emphasizes practical application and experiential learning, as farmers are more likely to adopt a new technology or practice if they have personally experienced its success through trial and practice.
Why other options are incorrect:
- a. Learning by reading: While literature is used, reading alone is passive and often ineffective for practical agricultural skills.
- c. Learning by seeing: This is known as 'Seeing is believing' (demonstration), which is a method used in extension, but the core principle that ensures mastery and adoption is the actual practice (doing).
- d. Learning by hearing: Auditory learning (lectures/radio) is a communication tool, but it is the least effective method for skill acquisition compared to hands-on experience.
The first Biosphere reserve in India is-
A)
Nilgiri
B)
Sundarban
C)
Nanda Devi
D)
Nokrek
The Nilgiri Biosphere Reserve, located in the Western Ghats across Tamil Nadu, Kerala, and Karnataka, was the first biosphere reserve established in India in 1986. It was designated under UNESCO's Man and the Biosphere (MAB) programme to conserve the unique biodiversity of the region, including the Nilgiri Tahr.
Analysis of other options:
- b. Sundarban: Established later; it is famous for the Royal Bengal Tiger and mangrove forests.
- c. Nanda Devi: Established later; located in Uttarakhand.
- d. Nokrek: Established later; located in Meghalaya.
Therefore, Nilgiri is the correct answer as it holds the distinction of being the first.
The set of ecosystems is called-
A)
Biodiversity
B)
Ecology
C)
Biome
D)
Hydrosphere
Step-by-step reasoning:
1. Understanding the Hierarchy: In ecology, there is a hierarchical organization of biological systems: Organism → Population → Community → Ecosystem → Biome → Biosphere.
2. Defining Ecosystem: An ecosystem is a community of living organisms interacting with their physical environment.
3. Defining Biome: A biome is a large-scale geographical region characterized by specific climate conditions, soil types, and vegetation. It consists of a set of similar ecosystems that share these common characteristics (e.g., the Tropical Rainforest biome contains various rainforest ecosystems). Therefore, a set of ecosystems is called a Biome.
4. Evaluating other options:
- (a) Biodiversity: Refers to the variety and variability of life on Earth, not a structural set of ecosystems.
- (b) Ecology: This is the scientific study of the interactions between organisms and their environment, not a biological unit.
- (d) Hydrosphere: This refers to all the waters on the earth's surface, such as lakes and seas; it is a physical sphere, not a collection of ecosystems.
What is the main objective of blanching vegetables before freezing?
A)
To improve taste
B)
To inactivate enzymes
C)
To enhance color
D)
To remove pesticides
Blanching is a critical preprocessing step in food preservation, particularly before freezing.
1. Why 'To inactivate enzymes' is correct: Vegetables contain natural enzymes (such as peroxidase and polyphenol oxidase) that remain active even at freezing temperatures. If not inactivated, these enzymes cause the degradation of vitamins, loss of flavor, and discoloration (browning) during storage. Blanching involves exposing the vegetable to boiling water or steam for a short time, which denatures these proteins (enzymes), thereby preserving the quality and shelf-life of the frozen product.
2. Why other options are incorrect:
- (a) To improve taste: Blanching does not typically improve taste; in some cases, over-blanching can actually lead to a loss of flavor due to leaching of water-soluble nutrients.
- (c) To enhance color: While blanching helps *preserve* the existing color by stopping enzymatic browning, its primary objective is the inactivation of the enzyme itself. In some cases, blanching can actually cause a slight loss of color.
- (d) To remove pesticides: Pesticides are removed through thorough washing and scrubbing, not through the heat treatment process of blanching.