Class 8 NCERT

Crop Production and Management

Introduction

  • Characters Introduced: Paheli and Boojho visit their uncle's house, who is a farmer.

  • Tools Noted: Khurpi, sickle, shovel, plough, etc.

  • Need for Agricultural Practices: To feed a large population, regular production, management, and distribution of food is necessary.

1.1 Agricultural Practices

  • Historical Context:

    • Before 10,000 B.C.E: Nomadic lifestyle, people wandering for food and shelter.

    • Transition to Agriculture: People cultivated land, producing rice, wheat, and other crops, marking the birth of agriculture.

  • Definition of Crop: A crop consists of plants of the same kind cultivated in a specific area (e.g., a wheat crop).

  • Types of Crops: Categorized into cereals, vegetables, and fruits.

  • Climatic Variability in India: Diverse climatic conditions impact the variety of crops grown across different regions.

1.2 Classification of Crops

  • Broad Cropping Patterns:

    • Kharif Crops:

    • Definition: Crops sown in the rainy season (June-September).

    • Examples: Paddy, maize, soybean, groundnut, cotton.

    • Rabi Crops:

    • Definition: Crops grown in the winter season (October-March).

    • Examples: Wheat, gram, pea, mustard, linseed.

    • Summer Crops: Pulses and vegetables grown during the summer season.

1.3 Basic Practices of Crop Production

  • List of Practices:

    1. Preparation of soil

    2. Sowing

    3. Adding manure and fertilizers

    4. Irrigation

    5. Protecting from weeds

    6. Harvesting

    7. Storage

1.4 Preparation of Soil

  • Importance:

    • Soil needs to be turned and loosened for root penetration and air access.

    • Loosening promotes growth of earthworms and microbes, which enhance soil fertility.

  • Nutrient Distribution:

    • Nutrients in the top soil are critical for plant growth; turning the soil helps bring nutrient-rich layers to the surface.

  • Tilling Process:

    • Defined as turning and loosening the soil, primarily through ploughing.

    • Tools used include wooden or iron ploughs.

  • Additional Tasks:

    • Breaking crumbs, leveling the field for even sowing and irrigation.

    • Moistening the soil before sowing, potentially adding manure for better mixing with soil.

1.5 Sowing

  • Importance: Good quality seeds of the right variety are vital.

  • Traditional Sowing Tools: Includes a funnel-shaped tool for seed dispersion.

  • Modern Tools: Exhibited through tractor-driven cultivators and seed drills which ensure uniform seed depth and distance.

1.6 Adding Manure and Fertilisers

  • Purpose: Nutrients for healthy plant growth.

  • Continuous Cultivation Effects: Depletes nutrients, requiring farmers to add manure to replenish soil fertility.

  • Types of Manure: Organic substances from decomposed plant and animal matter, enhancing soil properties.

  • Differences Between Manure and Fertilisers:

    • Manure: Natural, improves humus content.

    • Fertilisers: Man-made, rich in specific nutrients but can deplete soil quality if overused.

    • Examples of Fertilisers: Urea, ammonium sulphate, super phosphate, potash, NPK (Nitrogen, Phosphorus, Potassium).

  • Crop Rotation Benefits: Helps maintain soil nitrogen levels through alternating crops, such as legumes.

1.7 Irrigation

  • Definition: Regular watering of crops to maintain moisture.

  • Water Needs: Critical for seed germination, nutrient transport, and frost protection.

  • Sources of Irrigation: Wells, rivers, ponds, lakes, and canals.

  • Methods:

    • Traditional: Moat, chain pump, dhekli, rahat (lever system).

    • Modern: Sprinkler and drip systems; efficient usage of water, especially in uneven terrains.

1.8 Protection from Weeds

  • Definition of Weeds: Unwanted plants competing with crops for resources.

  • Weeding Importance: Reduces competition, ensures healthy crop growth.

  • Methods of Weeding: Manual removal, tilling, and the use of weedicides (e.g., 2,4-D) with safety precautions for health.

1.9 Harvesting

  • Definition: Cutting mature crops at ground level, typically done manually or by machine.

  • Processes Involved:

    • Threshing: Separating grains from chaff using machines like combines.

    • Harvest Festivals: Celebratory period after harvesting, noted festivals include Pongal, Baisakhi, Hoil, and Diwali.

1.10 Storage

  • Need for Proper Storage: Protect harvested grains from moisture and pests to ensure longevity and usability.

  • Storage Methods:

    • Use of jute bags, silos, and granaries.

    • Drying grains before storage to prevent spoilage.

2. Food from Animals

  • Animal Products: Milk from cows, goats, and camels; fish for health benefits (rich in vitamins).

  • Animal Husbandry Defined: Rearing animals for food production, ensuring proper care and nutrition.

Keywords

  • Agricultural Practices, Animal Husbandry, Crop, Fertiliser, Granaries, Harvesting, Irrigation, Kharif, Manure, Plough, Rabi, Seeds, Silo, Sowing, Storage, Threshing, Weeds, Weedicide, Winnowing.

Summary of Learnings

  • Emphasizes the adoption of agricultural practices to meet food demand.

  • Highlights different types of crops and their seasonal classifications.

  • Signifies the significance of soil preparation and nutrient management in crop production.

  • Discusses irrigation techniques and the importance of weed management for yield improvement.

Exercises

  1. Fill in the blanks with the correct terms and answer questions regarding the text's content to reinforce understanding.

  2. Engage in matching items between two categories.

  3. Conduct practical activities related to seed growth and irrigation.

Extended Learning Activities

  • Engaging field trips to farms to gather firsthand experience in modern vs. traditional agricultural practices.