Class 8 Science – Chapter 1: Crop Production and
Management
Introduction: Agriculture is the practice of growing crops for food, fodder and raw materials. India
is mainly an agricultural country, and proper crop management ensures high yield and food
security.
Steps in Agricultural Practices:
• 1. Preparation of Soil – Loosening the soil by ploughing, followed by leveling and adding
manure.
• 2. Sowing – Selection of healthy seeds and proper spacing for good growth.
• 3. Adding Manure and Fertilizers – Manure improves soil fertility, while fertilizers supply
nutrients like Nitrogen, Phosphorus, Potassium.
• 4. Irrigation – Supplying water to crops at different stages. Methods: Traditional (canals, wells)
and Modern (drip, sprinkler).
• 5. Protection from Weeds – Removal of unwanted plants by hand weeding or using chemicals
(weedicides).
• 6. Harvesting – Cutting mature crops with a sickle or harvester.
• 7. Threshing and Winnowing – Separating grains from husk.
• 8. Storage – Grains are dried and stored in silos, granaries or godowns with pesticides to
prevent spoilage.
Difference between Manure and Fertilizer:
Manure Fertilizer
Natural, obtained from animal waste and plant remains.
Artificial, made chemically in factories (NPK, urea).
Improves soil texture and fertility. Provides specific nutrients only.
Bulky, less nutrient content. Concentrated, high nutrient content.
Environment friendly. Excess use pollutes soil and water.
Types of Crops:
Kharif Crops Rabi Crops
Grown in rainy season (June–October). Grown in winter season (November–April).
Examples: Paddy, maize, cotton, soybean. Examples: Wheat, gram, mustard, pea.
Irrigation Methods:
• Traditional: Wells, canals, chain pump, lever system.
• Modern:
Management
Introduction: Agriculture is the practice of growing crops for food, fodder and raw materials. India
is mainly an agricultural country, and proper crop management ensures high yield and food
security.
Steps in Agricultural Practices:
• 1. Preparation of Soil – Loosening the soil by ploughing, followed by leveling and adding
manure.
• 2. Sowing – Selection of healthy seeds and proper spacing for good growth.
• 3. Adding Manure and Fertilizers – Manure improves soil fertility, while fertilizers supply
nutrients like Nitrogen, Phosphorus, Potassium.
• 4. Irrigation – Supplying water to crops at different stages. Methods: Traditional (canals, wells)
and Modern (drip, sprinkler).
• 5. Protection from Weeds – Removal of unwanted plants by hand weeding or using chemicals
(weedicides).
• 6. Harvesting – Cutting mature crops with a sickle or harvester.
• 7. Threshing and Winnowing – Separating grains from husk.
• 8. Storage – Grains are dried and stored in silos, granaries or godowns with pesticides to
prevent spoilage.
Difference between Manure and Fertilizer:
Manure Fertilizer
Natural, obtained from animal waste and plant remains.
Artificial, made chemically in factories (NPK, urea).
Improves soil texture and fertility. Provides specific nutrients only.
Bulky, less nutrient content. Concentrated, high nutrient content.
Environment friendly. Excess use pollutes soil and water.
Types of Crops:
Kharif Crops Rabi Crops
Grown in rainy season (June–October). Grown in winter season (November–April).
Examples: Paddy, maize, cotton, soybean. Examples: Wheat, gram, mustard, pea.
Irrigation Methods:
• Traditional: Wells, canals, chain pump, lever system.
• Modern:
