MCQs on Planting Geometry

MCQs on Soil fertility

By ExamupsPosted on 29/09/2024Posted in MCQ's, Principles Of Agronomy MCQTagged MCQs on Planting Geometry, MCQs on Soil fertility

MCQs on Soil fertility like ICAR-JEF, ICAR-SRF, ICAR-NET, IBPS-AFO/SO, Pre-PG, BHU Pre-PG, IFFCO-AGT, CCI, FCI, B.sc, M.sc, etc. Question 1: What is the term for the inherent capacity of the soil to supply plant nutrients in adequate quantities and suitable proportions? Answer:B) Soil fertility Explanation:Soil fertility refers to the inherent capacity of the soil to supply plant nutrients in adequate quantities and suitable proportions to support plant growth. Question 2: What does soil productivity refer to? Answer:A) The capacity of a soil to produce crops Explanation:Soil productivity is the capacity of a soil to produce crops. It is influenced by soil fertility and other factors like soil structure, moisture, and microbial activity. Question 3: Which of the following factors does NOT influence soil productivity? Answer:D) Soil color Explanation:Soil productivity is influenced by factors like soil fertility, physical condition, soil microorganisms, and moisture. Soil color does not have a direct impact on productivity. Question 4: Which type of nutrient loss is more prevalent in sandy soils? Answer:B) Leaching Explanation:Leaching is more prevalent in sandy soils because of their low water-holding capacity, causing nutrients to be washed away from the soil. Question 5: How can nutrients be lost from the soil through denitrification? Answer:D) In gaseous form Explanation:Denitrification is a process where soil bacteria convert nitrates into nitrogen gas (N₂) or nitrous oxide (N₂O), leading to nitrogen loss in gaseous form. Question 6: Which of the following practices can help maintain soil fertility? Answer:A) Regular addition of plant nutrients Explanation:Regular addition of plant nutrients helps maintain soil fertility by replenishing nutrients lost due to crop uptake, leaching, or other factors. Question 7: Which crop removes the most potassium (K) from the soil? Answer:C) Sorghum Explanation:Sorghum removes 200-300 kg/ha of potassium, which is the highest among the listed crops. Question 8: What is one method to prevent soil erosion, a common cause of fertility loss? Answer:A) Crop rotation Explanation:Crop rotation helps maintain soil structure and reduces soil erosion by providing continuous vegetation cover, minimizing wind and water erosion risks. Question 9: Why is soil organic matter important for maintaining soil fertility? Answer:A) It helps bind soil particles together Explanation:Soil organic matter improves soil structure by binding soil particles, enhancing moisture retention, and providing nutrients through decomposition. Question 10: Which of the following could be an inhibitory factor affecting soil productivity? Answer:B) Alkalinity Explanation:Alkalinity can inhibit plant growth by affecting nutrient availability and soil structure, reducing soil productivity. Question 11: Which of the following is a broader term used to indicate yields of crops? Answer:B) Soil productivity Explanation:Soil productivity encompasses not only soil fertility but also other factors that influence crop yields, such as water supply, land slope, and climate. Question 12: Soil fertility can be analyzed in the laboratory. What other term is evaluated in the field under particular climatic conditions? Answer:A) Soil productivity Explanation:Soil productivity is influenced by field conditions and climate, while soil fertility is typically assessed in a laboratory for nutrient availability. Question 13: Which process converts nitrate (NO₃) to nitrogen gas (N₂)? Answer:B) Denitrification Explanation:Denitrification is the process where nitrate (NO₃) is converted into nitrogen gas (N₂) by soil bacteria, resulting in nitrogen loss in gaseous form. Question 14: Which method helps maintain soil fertility through cultural practices? Answer:B) Using fallow periods Explanation:Fallow periods allow the soil to rest and replenish nutrients, helping maintain soil fertility as part of cultural practices. Question 15: Which of the following is an organic material used to maintain soil fertility? Answer:C) Compost Explanation:Compost is organic material derived from decomposed plant and animal matter, used to improve soil fertility and structure. Question 16: Which of the following can be used as a soil amendment to improve soil structure and fertility? Answer:A) Paddy husk Explanation:Paddy husk can improve soil structure by adding organic matter and aiding in soil aeration and drainage, contributing to soil fertility. Question 17: Which type of fertilizer involves using microorganisms to enhance soil fertility? Answer:B) Bio-fertilizers Explanation:Bio-fertilizers contain beneficial microorganisms like rhizobium, azotobacter, and blue-green algae, which enhance nutrient cycling and nitrogen fixation. Question 18: What is the potential status of soil in terms of nutrient availability? Answer:B) Soil fertility Explanation:Soil fertility refers to the potential status of the soil regarding its ability to supply plant nutrients in adequate quantities. Question 19: Which cultural practice involves growing different crops in the same field during different seasons to maintain soil fertility? Answer:C) Crop rotation Explanation:Crop rotation involves growing different crops in the same field in a systematic sequence, allowing the soil to regenerate and maintain fertility. Question 20: Which of the following represents the interaction of all factors that determine the magnitude of crop yields? Answer:A) Soil productivity Explanation:Soil productivity refers to the interaction of various factors, such as soil fertility, water supply, and land slope, that ultimately determine crop yields.

By ExamupsPosted on 29/09/2024Posted in MCQ's, Principles Of Agronomy MCQTagged MCQs on Planting Geometry

MCQs on Planting Geometry like ICAR-JEF, ICAR-SRF, ICAR-NET, IBPS-AFO/SO, Pre-PG, BHU Pre-PG, IFFCO-AGT, CCI, FCI, B.sc, M.sc, etc. Multiple-Choice Questions on Planting Geometry 1. What is competition in the context of plant growth?a) The struggle between individuals within a population for resources when the supply is less than their combined demandb) A race between plants to grow the fastestc) A process to breed better plant varietiesd) A method to improve plant resilience Answer: a) The struggle between individuals within a population for resources when the supply is less than their combined demandExplanation: Competition in plants refers to the struggle for resources such as nutrients, light, and water when they are in limited supply compared to the combined demand of the plants in the population. 2. What is intra-specific competition?a) Competition between different speciesb) Competition within a single speciesc) Competition among farmers for crop pricesd) Competition between plants and animals Answer: b) Competition within a single speciesExplanation: Intra-specific competition occurs within a single species, typically when plants of the same crop compete for resources like light, water, and nutrients. 3. What is the impact of high plant population on nutrient competition?a) It reduces nutrient uptakeb) It increases nutrient uptakec) It eliminates nutrient competitiond) It improves nutrient recycling Answer: b) It increases nutrient uptakeExplanation: A higher plant population increases nutrient uptake as more plants are competing for the same pool of nutrients. However, if the population is too high, nutrient deficiencies may occur. 4. How does competition for light occur in plant populations?a) When one plant casts a shadow on anotherb) When plants compete for soil nutrientsc) When plants compete for space to growd) When plants compete for water Answer: a) When one plant casts a shadow on anotherExplanation: Competition for light occurs when plants start to grow and their leaves cast shadows on other plants, reducing the available light for photosynthesis. 5. What is inter-specific competition?a) Competition within a single speciesb) Competition between different speciesc) Competition between plants and animalsd) Competition among different varieties of the same crop Answer: b) Competition between different speciesExplanation: Inter-specific competition occurs between different species, such as when different crops are grown in mixtures or when weeds compete with crops for resources. 6. How can plant population affect growth and yield?a) Higher plant populations always lead to higher yieldsb) Lower plant populations always lead to higher yieldsc) Optimum plant population leads to balanced growth and yieldd) Plant population does not affect growth or yield Answer: c) Optimum plant population leads to balanced growth and yieldExplanation: An optimum plant population ensures that there is sufficient space and resources for each plant to grow and yield well. Too high a population leads to competition and lower yields, while too low a population results in underutilization of resources. 7. Which factor is most likely to be affected by high plant population?a) Soil temperatureb) Nutrient availabilityc) Plant varietyd) Genetic stability Answer: b) Nutrient availabilityExplanation: High plant population increases competition for nutrients, leading to potential nutrient deficiencies if the soil’s fertility cannot support the larger population. 8. What can be a consequence of competition for water in plants?a) Uniform growth across the fieldb) Uneven plant growth and yieldc) Reduced pest problemsd) Increased soil aeration Answer: b) Uneven plant growth and yieldExplanation: Competition for water can lead to uneven plant growth, where some plants get more water than others, causing variability in growth and yield across the field. 9. What happens when competition for light becomes severe in a plant population?a) Increased plant healthb) Higher risk of disease and lower yieldsc) Better soil structured) Improved seed quality Answer: b) Higher risk of disease and lower yieldsExplanation: Severe competition for light leads to mutual shading, reducing photosynthesis, and causing plant stress, which can increase the risk of disease and reduce yields. 10. What is the primary purpose of maintaining optimum planting patterns and density?a) To minimize competition and maximize yieldb) To create uniform plant heightc) To facilitate easy harvestingd) To improve plant aesthetics Answer: a) To minimize competition and maximize yieldExplanation: Optimum planting patterns and density aim to minimize competition for resources and ensure that each plant has adequate space to grow, ultimately leading to better yields and healthier plants.lay crucial roles in achieving optimal stand establishment.