Q521. Which of the following is considered a crucial tool for real-time crop health monitoring in precision farming?
Health, Environment and Agriculture: RAS Prelims MCQs
662 RAS Prelims practice MCQs on health, environment and agriculture are on this page, in 4 chapters. They cover human health, food, nutrition and public health programmes, environmental and ecological changes and impact assessment, biodiversity and conservation of natural resources, and agriculture, horticulture, forestry and animal husbandry in Rajasthan. Each question has an answer and an explanation.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
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Q522. Consider the following statements regarding Precision Agriculture in Rajasthan:
I. It helps in managing the acute water scarcity through targeted micro-irrigation.
II. Remote sensing data is utilized to assess soil moisture indices.
III. Soil health cards act as a foundational data source for site-specific nutrient management.
IV. It requires high initial capital investment, which is a barrier for marginal farmers.
V. It advocates for the blind application of universally recommended fertilizer doses.
Which of the above statement(s) is/are correct?
I. It helps in managing the acute water scarcity through targeted micro-irrigation.
II. Remote sensing data is utilized to assess soil moisture indices.
III. Soil health cards act as a foundational data source for site-specific nutrient management.
IV. It requires high initial capital investment, which is a barrier for marginal farmers.
V. It advocates for the blind application of universally recommended fertilizer doses.
Which of the above statement(s) is/are correct?
Explanation
Precision agriculture in Rajasthan utilizes micro-irrigation, remote sensing, and soil health cards for efficient resource management. While these technologies help manage water scarcity and site-specific nutrients, high initial costs remain a barrier for small farmers. It does not advocate for blind fertilizer application; instead, it promotes targeted usage. Thus, the first four statements are correct reflections.
Q523. Identify the most appropriate definition of ‘Grid Sampling’ in the context of precision agriculture.
Explanation
Grid sampling is a technique used in precision agriculture to understand the variability of soil nutrients across a large area. The field is divided into smaller, uniform sections or "grids", and soil samples are collected from each. Analyzing these samples allows farmers to create detailed nutrient maps. This information is essential for applying fertilizers at variable rates, ensuring efficiency.
Q524. Which sensor technology is most commonly used in precision agriculture to measure crop health and vigor by analyzing reflected light?
Explanation
Normalized Difference Vegetation Index sensors are widely used to measure crop health and vigor. These sensors analyze the way plants reflect different wavelengths of light, particularly near-infrared and red light. Healthy vegetation reflects more near-infrared light and absorbs more red light. By calculating this index, farmers can identify stressed areas in the field and take corrective actions accordingly.
Q525. The implementation of precision agriculture in Rajasthan is directly beneficial for mitigating the effects of:
Explanation
Implementing precision agriculture in Rajasthan is directly beneficial for mitigating the challenges posed by high variability in soil and climate conditions. Since soil fertility and moisture levels can vary significantly even within a single field, uniform farming often leads to wastage or under-performance. Precision techniques allow for site-specific management, ensuring that every part is treated according to requirements.
Q526. Analyze the following cause and effect statements and select the correct option: Cause: Precision agriculture utilizes micro-irrigation systems coupled with soil moisture sensors. Effect: There is a significant increase in the water use efficiency of crops in arid regions.
Explanation
Precision agriculture integrates micro-irrigation systems with soil moisture sensors to ensure that water is applied only when and where it is needed. This targeted approach directly results in a significant increase in water use efficiency. In the arid regions of Rajasthan, where water is a scarce resource, such technological integration is vital for sustainable crop production and viability.
Q527. Yield monitors attached to combine harvesters provide data to create:
Explanation
Yield monitors are electronic devices attached to combine harvesters that record the amount of grain harvested in real-time. When coupled with GPS data, this information is used to create detailed yield maps. These maps show the variations in productivity across different parts of a field. Farmers can analyze these maps to understand why certain areas underperformed and plan accordingly.
Q528. In Rajasthan, the primary rationale for adopting polyhouse farming is to:
Explanation
The primary reason for adopting polyhouse farming in Rajasthan is to protect high-value crops like capsicum and exotic vegetables from harsh climatic conditions. Polyhouses shield plants from the intense desert sun, hot winds, and occasional frost. Additionally, they create a physical barrier against many insect pests. This controlled environment allows for year-round production of superior-quality produce, which fetches higher prices.
Q529. What is the fundamental principle behind the ‘greenhouse effect’ utilized in protected cultivation?
Explanation
The greenhouse effect in protected cultivation works by allowing short-wave solar radiation to enter through the covering material. Once inside, this energy is absorbed by the plants and re-radiated as long-wave thermal radiation. The structure’s cladding traps this heat, preventing it from escaping. This process maintains a warmer internal microclimate, which is essential for plant growth during winter.
Q530. Which of the following crops is most commonly grown under greenhouse conditions in Rajasthan due to its high commercial value?
Explanation
Roses and capsicum are among the most commonly grown crops under greenhouse conditions in Rajasthan. These high-value horticultural products require specific temperature and humidity levels to achieve premium quality. By cultivating them in a controlled environment, farmers can ensure consistent yields and better aesthetics. These products are highly demanded in urban markets and for significant export purposes.Answer key for these questions
| Q | Correct answer |
|---|---|
| 521 | (a) Unmanned Aerial Vehicles (Drones) |
| 522 | (a) I, II, III, and IV |
| 523 | (d) Mapping soil variability by dividing a field and sampling each section. |
| 524 | (c) NDVI sensors to analyze reflected light |
| 525 | (b) Variability in soil and climate conditions |
| 526 | (a) The Cause is true, and the Effect is the direct result of the Cause. |
| 527 | (a) Yield maps |
| 528 | (a) Protecting high-value crops from pests and extreme weather |
| 529 | (d) Trapping thermal radiation inside to maintain a warm microclimate. |
| 530 | (b) Rose and Capsicum |
Key facts from Health, Environment and Agriculture
- The RPSC General Science syllabus includes human health and nutrition, environmental change, biodiversity and the agriculture of Rajasthan.
- Health questions pair a deficiency or a programme with its cause or target, for example iron with anaemia.
- Environment questions cover ecosystems, pollutants, laws and treaties, including carbon markets.
- Rajasthan agriculture questions deal with dryland farming, crops of the arid zones and the State’s agro-climatic zones.
- Science and technology, policies and defence are on the Science and Technology page.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Health, Environment and Agriculture?
This page has 662 practice MCQs on Health, Environment and Agriculture. Each has the correct answer, and most have an explanation.
Which chapters does this set cover?
Four chapters: human health, food, nutrition and public health programmes; environmental and ecological changes and their impact assessment; biodiversity, conservation of natural resources and sustainable development; and agriculture, horticulture, forestry and animal husbandry in Rajasthan.
Are health, environment and agriculture part of the RAS Prelims syllabus?
Yes. The General Knowledge and General Science paper includes human health, nutrition, environment, biodiversity and the agriculture sector of Rajasthan, so these topics can be asked every year.
How can I revise this part of the syllabus?
Make short lists of deficiency diseases, pollutants, laws and treaties, and Rajasthan crops and zones. Attempt each chapter, read the explanations of the misses and revisit the lists after a few days.