NCERT Solutions Class 9 Kaushal Vikas Chapter 3: Precision Farming PDF (2026-27)

Get complete, official step-by-step NCERT Solutions for Class 9 Skill Education (Kaushal Vikas) Chapter 3: Precision Farming PDF for academic session 2026–27. This chapter is part of Work with Life Forms. All textbook in-text tasks, activities, portfolio assessments, and check-your-understanding questions have been verified by senior subject matter experts against the official NCERT prescribed syllabus.

NCERT Class 9 Kaushal Vikas Chapter 3 Textbook Solutions

Section 3.2 Process chart Questions & Solutions

Q1. PORTFOLIO: 1. Where will you use the precision techniques – in a farmer’s field or in school? 2. Which plants will you grow? Justify your choice.
Answer:
1. Location Choice: We will set up and use precision farming techniques in our school garden/nursery.
2. Plant Selection & Justification:
Selected Plants: Spinach, coriander, and cherry tomatoes.
Justification: As per the chapter text, plant selection should consider a short life cycle of 2 – 3 months and local usefulness (such as providing fresh vegetables for school midday meals). Spinach and coriander mature quickly (in 25 – 60 days), require moderate water, and can be grown easily in small beds or humidity chambers/low-tunnels.

Section 3.3 Site visit Questions & Solutions

Q1. PORTFOLIO: Table 3.3 lists some points of observation, while visiting the site. You can ask the expert, what they value most about their work (for example, quality of produce, connect with nature, opportunity for employment, earnings, etc.), and how they face any specific challenges. Create a process chart for the work you will do.
Answer: Model Site Visit Observations & Process Chart:
Observation Log (based on Table 3.3 guidelines):
Tools and materials used: Seedling trays, drip pipes, soil moisture sensors, LDR light sensors, cocopeat, compost, and biofertilisers stored neatly in dry storage.
Key processes: Setting up low-tunnels and humidity chambers, measuring Soil Organic Carbon (SOC) with hydrogen peroxide, automated drip irrigation, and preparing Lactic Acid Bacteria (LAB) culture.
Safety protocols: Wearing gloves while handling organic media/chemicals, keeping pruning shear blades closed, and ensuring bamboo/metal frames have no sharp edges.
Schedules: Daily morning weather monitoring, weekly drip filter cleaning, and bi-weekly biofertiliser application.
Quality criteria: High seedling germination in humidity chambers, targeted 1.5 – 2% Soil Organic Carbon, and digital QR code labeling for harvested produce.
Technology use: Mobile apps like National Pest Surveillance System (NPSS) for AI-based pest identification, Fasal, and Kisan Suvidha for weather and market trends.
Gardener/Expert Value: The expert values growing high-quality, chemical-free organic produce and saving water using drip irrigation. He faces challenges from extreme winter weather, which he overcomes using low-tunnels.
Process Chart (based on Table 3.2 template):
Task 1: Site selection and layout — Target Date: Week 1 — Responsibility: Layout Team
Task 2: Deciding crop protection method based on agro-climatic data — Target Date: Week 1 — Responsibility: Weather Data Team
Task 3: Testing for organic carbon and adding required compost — Target Date: Week 2 — Responsibility: Soil & Compost Team
Task 4: Setting up humidity chamber for raising seedlings — Target Date: Week 2 — Responsibility: Nursery Team
Task 5: Building a low-tunnel or shade-net — Target Date: Week 3 — Responsibility: Structure Team
Task 6: Installation of drip irrigation system — Target Date: Week 3 — Responsibility: Irrigation Team
Task 7: Preparing biofertiliser (LAB culture) — Target Date: Week 4 — Responsibility: Biofertiliser Group
Task 8: Identifying and managing pests using apps — Target Date: Weeks 4 – 10 — Responsibility: Pest Management Group
Task 9: Harvesting — Target Date: Weeks 8 – 12 — Responsibility: Harvest Team
Task 10: Packaging and transport/labelling with QR code* — Target Date: Weeks 8 – 12 — Responsibility: Packaging & Marketing Team

Section 3.4 Setting up a precision farming unit in school Questions & Solutions

Q1. TASK: Collecting weather data and deciding which crop protection method to use. Collect data from the school meteorological observatory (Chapter 1) and identify the crop protection method for your area (Table 3.4). You can also collect data from the Indian Meteorological Department (IMD) website, local Krishi Vigyan Kendra (KVK) or an agricultural university in your locality.
Answer: Model Procedure and Log:
Collected Weather Data: Recorded average temperatures between 24°C and 35°C during summer and cool winter temperatures around 15°C, along with heavy monsoon rainfall from June to September and high humidity (75 – 90%).
Selected Crop Protection Method (based on Table 3.4):
1. Greenhouse Structure: Selected to lower temperature during peak sun and protect high-value crops from heavy rainfall and winter frost.
2. Humidity Chamber: Selected for the plant nursery section to increase humidity and provide high moisture levels for young seedlings and stem cuttings before root development.
3. Low-tunnel: Selected during winter months to increase soil temperature by trapping solar heat, protecting crops from cold waves.

Q2. CHECK YOUR UNDERSTANDING: Students of Government High School collected data from the school meteorological observatory and the meteorological department website. They observed that the temperature usually ranges between 22°C and 34°C (the hottest months are April and May, while December is the coolest with 22°C). The area experiences heavy monsoon rainfall, mainly from June to September (average annual precipitation of around 3,000 to 3,350 mm). Humidity remains high, between 70 and 90 per cent, especially during the monsoon season. Which crop protection method should they use? Justify your selection.
Answer:
Recommended Crop Protection Method: They should use a Greenhouse structure for their field crops and a Humidity Chamber for nursery seedlings.
Justification based on Table 3.4:
1. Greenhouse: According to Table 3.4, a greenhouse provides protection from heavy rainfall (the area receives very high precipitation of 3,000 to 3,350 mm) and lowers high summer temperatures (April/May temperatures reach 34°C), preventing waterlogging and heat damage.
2. Humidity Chamber: Maintains high, precise humidity for tender seedlings during nursery propagation.
(Note: A low-tunnel is not ideal as primary protection here because it increases temperature, which would overheat plants during hot months).

Q3. PORTFOLIO: Make a sketch of the layout of the precision farming unit you plan to set up. Mark the dimensions accurately.
Answer: Model Layout Sketch Description & Dimensions:
Total Unit Dimensions: 10 m × 5 m (Total Area = 50 sq m).
Marked Sub-Zones (based on Figure 3.3):
1. Low-Tunnel Zone (Area A): 3 m × 1.5 m frame made of curved bamboo hoops covered with transparent polyethylene sheet.
2. Shade-Net / Nursery Zone (Area B): 3 m × 2 m structure covered with shade netting for seedling trays.
3. Raised Plant Beds (Area C): Two beds measuring 4 m × 1 m each, equipped with drip irrigation lateral lines.
4. Humidity Chamber Space: 1 m × 1 m enclosed mini-unit placed inside the nursery area.
5. Composting Bed (Area D): 2 m × 1 m area for organic waste decomposition.
6. Water Tank & Pump (Area G) and Tool Storage (Area F): 1.5 m × 1.5 m corner shed with water source and automated drip controller.
7. Pathways: 0.8 m wide clear walking pathways between beds for easy maintenance.

Section 3.7 Making Bill of Materials Questions & Solutions

Q1. PORTFOLIO: Create a Bill of Materials for the work you will do.
Answer: Model Bill of Materials (based on Table 3.7 template):

Seedling Trays (Plug trays): Quantity = 10; Estimated cost = ₹100; Remarks = As per space available in nursery.
Bamboo poles (2 m long): Quantity = 20 poles; Estimated cost = ₹200; Remarks = Framework for low-tunnel and humidity chamber.
Transparent Polyethylene sheet: Quantity = 15 sq m; Estimated cost = ₹350; Remarks = Cover for low-tunnel and humidity chamber.
Mulching material (used paper/film): Quantity = 20 sq m; Estimated cost = ₹300; Remarks = Suppresses weeds and retains soil moisture.
Spinach and Tomato seeds: Quantity = 200 g; Estimated cost = ₹150; Remarks = High quality, disease-free seeds.
Drip irrigation pipe & drippers set: Quantity = 1 set (20 m lateral); Estimated cost = ₹500; Remarks = Micro-irrigation with control valves.
Labour (Watering, bed preparation, making low-tunnel): Value = Time spent in hours × hourly estimate = ₹167.50.
TOTAL ESTIMATED COST: ₹1,767.50

Section 3.8 Building a precision farming unit in school Questions & Solutions

Q1. TASK: Observe the germination and growth of seedlings in a humidity chamber. Follow the simple steps for this activity: 1. Observe plants on a daily basis for germination (sprouting), growth, number of leaves, etc., and prepare an observation record. 2. Keep a record of the temperature and humidity in the humidity chamber. 3. Note any analysis or reflections, based on your observations.
Answer: Model Activity Observation Report:
1. Daily Plant Observation Record:
Day 1 – 3: Seeds sown in plug trays inside the humidity chamber (clear polythene bag over tray). Soil kept moist.
Day 4 – 5: Sprouting observed (85% germination rate). Small green shoots emerged.
Day 8 – 10: Seedlings reached 4 cm height with 2 true leaves developed.
Day 14: Seedlings reached 8 cm height with 4 – 5 healthy leaves, ready for transplanting to low-tunnel beds.
2. Environmental Log (using Hygrometer / DIY Weather Monitor):
Internal Humidity: Maintained high between 85% and 95%.
Internal Temperature: Maintained warm range of 25°C to 28°C.
3. Analysis and Reflections: The high humidity inside the chamber prevented soil from drying out, eliminated the need for heavy daily watering, protected tender shoots from cold air, and accelerated root and leaf growth compared to open tray sowing.

Q2. TASK: Setting up drip irrigation system
Answer: Model Step-by-Step Procedure and Observations (based on Figure 3.8):
Step 1 (Laying out pipes): Laid main supply pipe from the water tank and connected smaller lateral drip pipes along the raised plant beds.
Step 2 (Attaching drippers): Fixed small drip emitters/nozzles at precise intervals directly near the root zone of each plant.
Step 3 (Connecting to water source): Connected the main pipe to an elevated water tank / water pump.
Step 4 (Adding filter unit): Fitted a line filter near the pump output to trap debris and prevent clogging of emitters.
Step 5 (Flow control): Installed control valves on each lateral line to regulate water delivery to different plant beds.
Step 6 (Integrating fertigation): Added liquid biofertiliser into the water tank so water and measured nutrients are delivered directly to plant roots together.
* Result: Water was delivered directly to plant roots drop-by-drop without flooding the field, saving up to 60 – 80% water compared to flood irrigation.

Q3. TASK: Rough estimation of organic carbon in soil
Answer: Model Experimental Procedure, Observations, and Calculations:
Procedure:
1. Took equal amounts of debris-free soil in two clear glass jars: Sample A (Control soil without compost) and Sample B (Test soil enriched with compost).
2. Poured 3% Hydrogen Peroxide (H₂O₂) into both containers until saturated while wearing protective gloves.
3. Observed the immediate oxidation reaction (fizzing/bubbling) as H₂O₂ reacts with Soil Organic Carbon (SOC) to release oxygen gas (O₂).
Observations (based on Table 3.8):
Sample A (Control): Light bubbling, indicating moderate to low organic carbon.
Sample B (Compost Enriched): Intense effervescence and dense foam, indicating high organic carbon content.
Calculation of Compost required for 2% Target SOC (based on Figure 3.10):
1. Field Volume: Bed size 1 m × 1 m × 0.5 m = 0.5 m³.
2. Soil Mass Needed: 0.5 m³ × 1300 kg/m³ = 650 kg soil.
3. Target Carbon Mass (2% SOC): 650 kg × 2% = 13 kg carbon.
4. Compost Mass (30% carbon content in compost): 13 kg ÷ 0.30 = 43.3 kg compost.
5. Final Adjustment (only 20% compost remains stable; 80% consumed by microbes):* 43.3 kg ÷ 0.20 ≈ 215 kg compost required for 0.5 m³ soil volume.

Section 3.9 Preparing an organic biofertiliser for nutrients Questions & Solutions

Q1. TASK: Preparing a Lactic Acid Bacteria (LAB) culture
Answer: Model Procedure and Result (based on Figure 3.11):
Materials Used: 500 g rice, 100 mL milk, clean water, glass jars, muslin cloth, rubber bands.
Step-by-Step Execution:
1. Washed 500 g uncooked rice in clean water and collected the cloudy rinse water from the first two washes.
2. Poured rinse water into a clean jar (2/3rd full), covered with muslin cloth secured with a rubber band, and kept undisturbed at room temperature in shade for 4 days.
3. After fermentation, a floating mat formed; poured off the cloudy liquid underneath containing wild LAB.
4. Mixed 1 part fermented rice water with 10 parts milk in a clean jar (2/3rd full) and kept in a dark place for 4 days.
5. The mixture separated into solid curds on top and a clear yellow liquid at the bottom.
6. Poured off the yellow liquid carefully into a clean bottle — this yellow liquid is the active Lactic Acid Bacteria (LAB) culture.
* Application: Diluted 1 L of LAB culture in 9 L of clean water (1:9 ratio) and applied to plants via drip irrigation or direct soil drenching to improve nutrient uptake and soil health.

Section 3.10 Identification and management of pests Questions & Solutions

Q1. TASK: Identify the insects on the plants or those collected in the light trap using the mobile app (National Pest Surveillance System – NPSS). 1. What is their role in the ecosystem? 2. What value do they add to the ecosystem? 3. How many of them are pests (harmful for your plants)?
Answer: Model Activity Report using NPSS App:
1. Role in the Ecosystem: Insects collected in the light trap and scanned via NPSS include pollinators (bees, moths), decomposers (beetles), natural predators (ladybird beetles), and herbivores (aphids, caterpillars). They help maintain ecological balance, food chains, and soil nutrient cycling.
2. Value Added to the Ecosystem: Useful insects add value by pollinating crop flowers to form fruits/seeds, breaking down organic waste into rich humus, and acting as natural biocontrol agents that feed on crop-damaging pests.
3. Identification of Harmful Pests: Out of 15 insects scanned via NPSS, 4 were identified as harmful pests (caterpillars and aphids that suck sap and chew leaves), while the remaining 11 were beneficial or neutral organisms.

Section 3.13 Assess your learning Questions & Solutions

Q1. Describe the role of digital tools in precision farming. How do they change the way decisions are made on farms?
Answer:
Digital tools play a transformative role in precision farming by shifting agriculture from experience-based guessing to precise, data-driven management.
1. Data-Driven Decisions: Sensors (such as soil-moisture sensors and climate sensors) monitor soil moisture and temperature in real time, enabling automated irrigation only when needed.
2. Remote Crop Monitoring: Satellite imagery and drone ‘health maps’ highlight crop health variations (using color codes where red shows poor health and green shows good health), allowing targeted fertilizer or pesticide application.
3. Pest & Weather Intelligence: AI-based apps like the National Pest Surveillance System (NPSS) identify insect pests instantly, while apps like Fasal and Kisan Suvidha provide weather forecasts and market price trends, helping farmers decide exact harvesting and selling times.

Q2. Create a safety checklist for the tools you used, including digital tools.
Answer:
Manual & Cutting Tools Safety Checklist:
[ ] Hand Trowel & Pruning Scissors: Inspect handles for cracks; keep blades closed when not in use; clean and store in dry tool racks after work.
[ ] Gloves: Wear protective gloves whenever handling soil, compost, or chemical/organic solutions to prevent skin irritation.
[ ] Measuring Tape: Use flexible tape carefully to avoid cuts from sharp metal edges.
Digital & Electrical Tools Safety Checklist:
[ ] DIY Sensors & Microprocessors (Arduino/LDR/Moisture Sensors): Ensure all wire connections are insulated; operate on low-voltage batteries (e.g., 9V); keep circuit boards inside waterproof enclosures away from water spills.
[ ] Mobile Devices & Apps:* Use secure, official government apps (like NPSS); keep devices charged and dry during field visits.

Q3. During a visit to a precision farming unit, list the key aspects you would observe to understand how precision techniques are applied.
Answer: Key aspects to observe during a site visit include:
1. Climate Control Structures: Use of greenhouses, shade-nets, low-tunnels, or humidity chambers to modify temperature and humidity for crop protection.
2. Irrigation Efficiency: Micro-irrigation systems like drip emitters connected to soil-moisture sensors for automated, targeted watering.
3. Nutrient & Soil Management: Methods used for testing Soil Organic Carbon (SOC) and precise nutrient delivery through fertigation.
4. Digital & Sensor Tools: Presence of automated weather monitors, LDR light traps, and AI mobile apps for pest surveillance.
5. Post-Harvest & Packaging: Climate-controlled storage, smart sensors in transit packages, and QR code digital labels showing harvest origin and farming methods.

Q4. A farmer is using random compost application in one nursery bed and measured compost in another.
Answer:
Comparison of Outcomes:
1. Measured Compost Bed (Precision Farming): Applying calculated compost based on Soil Organic Carbon (SOC) testing (targeting 1.5% to 2.0% SOC) provides plants with the exact nutrients required for healthy root growth and high water-holding capacity, preventing nutrient deficiency or toxicity and ensuring uniform plant growth.
2. Random Compost Bed (Traditional Farming):* Applying random amounts can lead to under-fertilization (causing poor growth and low organic carbon) or over-fertilization (wasting compost, increasing costs, and polluting soil), leading to uneven crop growth.

Q5. You are asked to design a nursery layout. How would you ensure uniform growth and optimal use of resources?
Answer:
To ensure uniform growth and optimal resource use in a nursery layout:
1. Zoning by Needs: Divide the nursery into dedicated functional zones — a humidity chamber for tender seedling germination, shade-net beds for growing saplings, raised beds for main crops, and a central water/fertigation station.
2. Uniform Micro-Climate & Spacing: Use standardized plug trays placed inside a humidity chamber to maintain consistent moisture (80 – 90%) and temperature, ensuring equal spacing and sunlight penetration.
3. Automated Drip Fertigation: Install a drip irrigation network equipped with soil-moisture sensors and fertigation valves to deliver uniform, measured amounts of water and liquid biofertilisers directly to every seedling’s root zone without waste.

Q6. ‘With the help of technology, you can grow anything, anywhere, anytime.’ Do you agree with this statement? Give two examples to support your answer. If a farmer has limited water resources, how can precision farming techniques help them use water more efficiently?
Answer:
Agreement & Examples: Yes, I agree with this statement because precision technology allows farmers to artificially create and control ideal growing environments regardless of external weather.
1. Example 1: Growing summer vegetables (like tomatoes and cucumbers) during harsh winter months using low-tunnels that trap solar heat and create a greenhouse effect.
2. Example 2: Raising delicate seedlings year-round in extreme climates using climate-controlled greenhouses and humidity chambers.
Efficient Water Use for Limited Water Resources:
1. Drip Micro-Irrigation: Delivers water drop-by-drop directly to the plant root zone, eliminating evaporation and runoff losses associated with flood irrigation.
2. Soil-Moisture Sensors: Automate irrigation pumps to supply water only when soil moisture drops below critical thresholds, preventing over-watering and saving up to 60 – 80% water.

Q7. Suggest one low-cost innovation that could help small farmers adopt precision farming practices.
Answer: A simple, low-cost innovation is a DIY Plastic Bottle Humidity Chamber / Mini Low-Tunnel.
Description: Small farmers can cut off the bottom of discarded transparent plastic bottles and place them over individual pots/seedlings, or bend flexible bamboo strips into hoops and cover them with clear plastic sheets.
Benefit: This creates a low-cost, effective mini-greenhouse that traps moisture and warmth, raising germination rates and protecting delicate seedlings from harsh weather at virtually zero cost.

Q8. Of the tasks that you did, which did you enjoy the most? Which did you enjoy the least? Give examples of what went well and what did not go well. What would you do differently next time?
Answer: Model Class 9 Student Reflection:
Most Enjoyed Task: Preparing the Lactic Acid Bacteria (LAB) culture from fermented rice water and milk, and building the DIY LDR sensor light trap for insect monitoring.
Least Enjoyed Task: Calculating heavy soil and compost masses (e.g., 215 kg compost calculation) for soil organic carbon adjustment.
What Went Well: The LAB culture separated clearly into curds and active yellow liquid, and the NPSS mobile app accurately identified insect pests.
What Did Not Go Well: Our initial low-tunnel plastic cover flapped loose during high winds because edges were not anchored firmly.
* What to Do Differently Next Time: Bury the edges of low-tunnel plastic sheets in side soil trenches and install automated soil-moisture sensors for drip fertigation right at the start.

Q9. Give examples of how you can apply your learning in a real-life situation.
Answer:
1. Home / Community Gardening: Build simple humidity chambers using clear plastic bottles or bags to raise vegetable seedlings at home, and test soil organic carbon using 3% hydrogen peroxide before planting.
2. Organic Biofertiliser Preparation: Prepare Lactic Acid Bacteria (LAB) culture using rice rinse water and milk, diluting it 1:9 with water to nourish balcony plants organically without synthetic chemical fertilizers.
3. Smart Irrigation & Pest Control: Install micro-drip irrigation connected to simple timer valves or soil-moisture sensors in home gardens to save water, and build LDR light traps or use the NPSS AI mobile app to identify and manage pests sustainably.

More Kaushal Vikas Chapters & Study Resources

• ⬅️ Previous: Chapter 2: Rooftop Gardening
• ➡️ Next: Chapter 4: Additional Vocations (Work with Life Forms)
• 📚 All Class 9 NCERT Books: Class 9 NCERT Books (2026–27)
• 📖 Full Library: All NCERT Books PDF (Class 1–12)

Frequently Asked Questions (FAQs)

Q1: What is the main objective of Kaushal Vikas Chapter 3?
Ans: Chapter 3 (Precision Farming) provides Grade 9 students with foundational vocational knowledge, real-world skill-building tasks, and practical applications in Work with Life Forms.

Q2: Are these solutions verified according to the 2026–27 CBSE curriculum?
Ans: Yes. All questions, exercises, and tasks are solved directly from the official NCERT 2026–27 textbook following official NCERT pedagogical guidelines and the latest CBSE marking scheme.