NCERT Class 9 Skill Education Important Chapter 3 Precision Farming

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NCERT Class 9 Skill Education Important Chapter 3 Precision Farming

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Precision Farming

Chapter: 3

IMPORTANT SOLUTIONS

1. What does precision farming primarily focus on? 

Ans: It focuses on giving plants exactly what they need, such as the right amount of water and nutrients, at the exact time needed.

2. What do the red and green colours indicate on a remote sensing crop health map? 

Ans: Red indicates the worst crop health, while green indicates the best crop health.

3. What is the recommended life cycle duration for plants chosen for a school precision farming unit? 

Ans: The plants should ideally have a life cycle of 2 to 3 months.

4. Which farming structure is best for protecting crops from frost and lowering temperatures? 

Ans: A greenhouse is used for lowering temperatures and protecting plants from frost and rainfall.

5. Why is a humidity chamber useful in a plant nursery? 

Ans: It provides high moisture levels, making it ideal for seed germination and the rapid growth of cuttings.

6. What is the main purpose of building a low-tunnel? 

Ans: A low-tunnel is used to increase temperature by trapping solar heat and to protect plants from harsh weather.

7. Which document helps you estimate costs in advance so you do not waste resources? 

Ans: A Bill of Materials helps estimate costs and organize work step by step.

8. What mixture should be spread at the base of a low-tunnel? 

Ans: A 1:1 proportion of sand and compost should be spread at the base.

9. Which hand tool is specifically used for digging soil and transplanting seedlings? 

Ans: A hand trowel is used for these tasks.

10. Why must a filter unit be attached to a drip irrigation system? 

Ans: A filter is necessary to prevent the clogging of pipes and drippers.

11. What do you call the process of mixing fertilisers into the irrigation tank to deliver water and nutrients together? 

Ans: This process is called fertigation..

12.  Which chemical solution is used to test the soil for organic carbon? 

Ans: 3 per cent Hydrogen Peroxide (H₂O₂) is used for this rough estimation.

13. During the soil test, what does intense bubbling or foaming mean? 

Ans: It indicates that the soil has good or high organic carbon.

14. For healthy plant growth, what percentage of organic carbon should the soil contain? 

Ans: The soil must contain between 1.5 per cent and 2.0 per cent organic carbon.

15. Out of all the compost added to the soil, how much remains stable for the plants to actually use? 

Ans: Only 20 per cent of the compost remains stable for the plants.

16. Q: What does LAB stand for when preparing an organic biofertiliser? 

Ans: LAB stands for Lactic Acid Bacteria.

17.  What is the primary base ingredient collected to start a LAB culture? 

Ans: Uncooked rice rinse water from the first two washes is used as the base

18. Which electronic component can automatically switch an insect trap on at night and off during the day? 

Ans: A Light Dependent Resistor (LDR) sensor.

19. Q: Which mobile application uses AI to help farmers identify harmful insect pests? 

Ans: The National Pest Surveillance System (NPSS) application.

20. According to data-driven farming, when is the best time of day to harvest your produce? 

Ans: Harvesting is best done when the temperature and humidity are the lowest.

B. Long Question Answer:

1. What are the main differences between traditional farming and precision farming across various agricultural practices? 

Ans: In traditional farming, practices like watering, fertilising, and pest management are generally based on experience or done randomly. For example, traditional farming relies on rainfall or flood irrigation, which can lead to water wastage. In contrast, precision farming uses targeted micro-irrigation (like drip or sprinkler systems) guided by soil-moisture sensors and automated systems to deliver exactly what the plant needs. Fertiliser and pesticide application in traditional methods is estimated purely by experience, whereas precision farming uses need-based application guided by soil analysis, drones, satellites, and expert mobile apps. Furthermore, traditional harvesting often leads to higher losses due to poor handling, but precision farming lowers these losses by using automated harvesters, sensors, and advanced smart packaging.