Q.1
ICAR AIEEA PG 2024 - Agronomy - Weed Biology, Classification, Propagation, Dormancy, Dissemination and Crop-Weed Competition (Q.47)
MCQ (Single Correct) +4 −1
English हिन्दी
Weed seed dispersal by ants is known as :
चींटियों द्वारा खरपतवार के बीजों का प्रकीर्णन (Dispersal) कहलाता है :
EXPLANATION Weed Biology, Classification, Propagation, Dormancy, Dissemination and Crop-Weed Competition
  • Myrmecochory: Seed dispersal specifically mediated by ants (often attracted by lipid-rich elaiosomes on seeds).
  • Autochory: Self-dispersal by explosive pod dehiscence or mechanical projection.
  • Anemochory: Dispersal by wind.
  • Zoochory: Dispersal by animals in general.
Hence, dispersal by ants is Myrmecochory.
  • मिरमेकोकोरी (Myrmecochory): चींटियों द्वारा बीजों का प्रकीर्णन। चींटियां बीजों पर लगे तैलीय उपांग (Elaiosome) के कारण आकर्षित होकर बीजों को ले जाती हैं।
  • ऑटोकोरी (Autochory): स्वयं पौधे द्वारा फल के फटने से बीजों का प्रकीर्णन।
अतः विकल्प 1 सही है।
Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report
Want to practice this paper in exam conditions? क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं? Test yourself in 5-question batch format with timer and hidden answers. 5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode → प्रैक्टिस टेस्ट मोड शुरू करें →

Agronomy विषय एवं अध्याय

विषय एवं पाठ्यक्रम के अनुसार सभी अध्याय देखें

सामान्य कृषि, पादप जैविकी, फसल सुरक्षा एवं सांख्यिकी

6 टॉपिक्स
Plant Physiology, Photosynthesis, Transpiration and Abiotic Stresses in Crops Historical Milestones, Agricultural Education, ICAR Institutes and Research Infrastructure Genetics, Cytogenetics, Plant Breeding Methods and Varietal Improvement Crop Protection: Major Diseases, Insect Pests and Integrated Plant Health Management Agricultural Statistics, Probability Distributions and Experimental Field Designs (CRD, RBD, SPD) Agricultural Extension, Rural Development Programs and Technology Transfer (KVK, ATMA)

सस्य विज्ञान के सिद्धांत, फसल पारिस्थितिकी, कृषि भूगोल एवं कृषि मौसम विज्ञान

8 टॉपिक्स
Atmospheric Humidity, Precipitation, Monsoon Dynamics, Weather Forecasting and Agro-Climatic Zones Principles of Agronomy: Definition, Scope, History, Tillage, Tilth and Seedbed Preparation Agricultural Meteorology: Solar Radiation, Photosynthetically Active Radiation (PAR) and Albedo Climate Change, Greenhouse Gases, Global Warming and Impact on Crop Phenology Cropping Systems: Monocropping, Intercropping, Mixed, Sequential, Relay and Competition Indices (LER, ATER) Crop Growth Analysis, Growth Indices (LAI, CGR, RGR, NAR, LAR, SLA) and Yield Attributes Temperature, Growing Degree Days (GDD), Photoperiodism, Thermoperiodism and Heat Units Planting Geometry, Plant Density, Sowing Methods and Crop Stand Establishment

प्रमुख क्षेत्रीय फसलों का सस्य विज्ञान

9 टॉपिक्स
Agronomy of Cereal Crops I - Rice: Ecology, Nursery, SRI, Direct Seeded Rice (DSR), Water & Nutrient Management Agronomy of Coarse Cereals and Millets: Maize, Sorghum, Pearl Millet, Finger Millet and Small Millets Agronomy of Major Pulse Crops: Chickpea, Pigeonpea, Mungbean, Urdbean, Lentil and Field Pea Agronomy of Cereal Crops II - Wheat and Barley: Sowing Depth, CRI Stage, Tillage, Nutrient & Irrigation Agronomy of Commercial & Fiber Crops: Cotton, Jute, Sunnhemp and Mesta Agronomy of Plantation, Spice, Medicinal and Aromatic Crops: Tea, Coffee, Turmeric, Ginger and Mentha Agronomy of Fodder, Forage and Pasture Grasses: Berseem, Lucerne, Oat, Sorghum, Napier and Guinea Grass Agronomy of Major Oilseed Crops II: Soybean, Sunflower, Safflower, Linseed, Niger and Castor Agronomy of Sugar Crops: Sugarcane, Sugarbeet, Planting Systems (Trench, IISR, STP) and Ratoon Management

खरपतवार प्रबंधन एवं नियंत्रण

9 टॉपिक्स
Weed Biology, Classification, Propagation, Dormancy, Dissemination and Crop-Weed Competition सक्रिय Chemical Control: Classification of Herbicides (Selectivity, Application Timing, Chemical Families) Herbicide Formulations, Surfactants, Adjuvants, Safeners and Application Equipment Critical Period of Crop-Weed Competition (CPWC) and Allelopathy in Agro-Ecosystems Herbicide Persistence, Soil Residual Fate, Leaching, Volatilization, Photodecomposition and Selectivity Mechanisms Integrated Weed Management (IWM): Cultural, Physical, Mechanical, Biological (Bioherbicides) and Chemical Controls Herbicide Resistance in Weeds, Cross & Multiple Resistance Mechanisms and Herbicide Tolerant Crops Parasitic Weeds (Striga, Orobanche, Cuscuta, Loranthus) and Aquatic/Invasive Weeds (Eichhornia, Parthenium) Herbicide Mode of Action: ALS, ACCase, Photosystem I & II, EPSPS, Synthetic Auxins, Glutamine Synthetase

जल प्रबंधन, सिंचाई एवं जल निकास

5 टॉपिक्स
Soil-Plant-Water Relations: Soil Moisture Constants, Soil Water Potential, Moisture Retention Curves and Hysteresis Crop Water Requirements, Water Use Efficiency (WUE), Consumptive Use and Irrigation Water Quality (SAR, RSC) Irrigation Methods: Surface (Check Basin, Furrow, Border), Pressurized (Drip, Sprinkler) and Fertigation Irrigation Scheduling Criteria: Soil Moisture Depletion, IW/CPE Ratio, Critical Growth Stages and Tensiometers Agricultural Drainage: Surface and Sub-surface Drainage Systems, Waterlogging Remediation and Salt Leaching

मृदा उर्वरता, पोषक तत्व एवं उर्वरक उपयोग

7 टॉपिक्स
Nutrient Dynamics in Soils: Nitrogen Transformation, Mineralization, Immobilization, Nitrification, Denitrification Secondary and Micronutrients in Soils: Calcium, Magnesium, Sulfur, Zinc, Iron, Manganese, Copper, Boron Essential Plant Nutrients: Classification, Criteria of Essentiality, Roles and Deficiency/Toxicity Symptoms Straight, Complex, Mixed, Slow-Release and Specialty Fertilizers: Chemical Properties, Salt Index and Reactions Integrated Nutrient Management (INM), Site-Specific Nutrient Management (SSNM), Soil Testing and Biofertilizers Phosphorus and Potassium Dynamics: Fixation, Adsorption-Desorption, Quantity-Intensity (Q/I) Relationships Nitrification Inhibitors (N-Serve, DCD, Neem-Coated Urea) and Nitrogen Use Efficiency (NUE) Enhancement

शुष्क भूमि सस्य विज्ञान एवं जलसंभर प्रबंधन

3 टॉपिक्स
Crop Adaptation to Drought, Anti-transpirants (Stomatal, Reflecting, Film-forming) and Mulching Techniques Rainwater Harvesting, In-situ Moisture Conservation, Contingency Crop Planning and Watershed Management Dryland vs Rainfed Farming: Characteristics, Classification, Moisture Stress and Drought Types

समस्याग्रस्त मृदाएं, सुधार एवं फसल उत्पादन

2 टॉपिक्स
Salt-Affected Soils: Saline, Sodic, Saline-Sodic Soils, Diagnostics (ECe, ESP, SAR, pH) and Chemical Reclamation Acid, Acid-Sulfate, Calcareous and Degraded Problem Soils: Liming, Amelioration and Crop Adaptation

टिकाऊ भूमि उपयोग प्रणालियां एवं संरक्षण कृषि

3 टॉपिक्स
Agroforestry Systems, Farming Systems Research (FSR), Integrated Farming Systems (IFS) and Wasteland Management Conservation Agriculture: Principles, Minimum Tillage, Zero Tillage, Bed Planting and Crop Residue Retention Organic Farming, Natural Farming (ZBNF), Certification Standards and Organic Inputs Preparation
Official PYQ Papers

Previous Year Papers of Agronomy

Practice official shift-wise question papers with answer keys and detailed explanations on the actual exam pattern.

3
Total Available Previous Papers

Choose Exam

Exam Directory

Browse official Previous papers and mock tests

10 Major Agriculture Exams Available

RPSC Agriculture Exams

5 Exams
Food Safety Officer Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

RSSB Agriculture Exams

1 Exam
कृषि पर्यवेक्षक (RSSB)

National & PG Entrances

4 Exams
ICAR AIEEA PG CUET UG Rajasthan Agriculture Pre-PG ICAR JRF/SRF