Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Agriculture is the practice of cultivating plants and rearing animals for food, fiber, and other products. Crops are classified into (sown in June/July, e.g., Paddy) and (sown in October/November, e.g., Wheat).
Soil preparation involves ploughing (loosening soil) and levelling. Soil fertility is maintained using Manure (organic) and Fertilizers (chemical inorganic salts containing , , and ).
Nitrogen Fixation is the process where atmospheric is converted into nitrogenous compounds like nitrates () by bacteria such as found in the root nodules of leguminous plants.
Irrigation methods include traditional methods and modern techniques like Drip irrigation and Sprinkler systems to conserve .
Animal Husbandry includes the breeding, feeding, and weeding of livestock. Major branches include Apiculture (honey bees), Sericulture (silkworms), Pisciculture (fish), and Poultry (birds).
Organic Farming is a technique that avoids the use of synthetic fertilizers and pesticides (, etc.) and focuses on the use of -, crop rotation, and green manure.
The Green Revolution in India led to a massive increase in food grain production due to the use of High Yielding Variety () seeds and modern irrigation.
📐Formulae
💡Examples
Problem 1:
Explain why leguminous plants are often grown in crop rotation to improve soil quality.
Solution:
Leguminous plants contain bacteria in their root nodules which fix atmospheric into nitrates.
Explanation:
Nitrogen is essential for plant growth but plants cannot absorb gas directly. The bacteria convert it into a soluble form () which enriches the soil naturally without the need for chemical fertilizers.
Problem 2:
Identify the chemical components of a common fertilizer labeled as .
Solution:
The components are Nitrogen (), Phosphorus (), and Potassium ().
Explanation:
These three elements are macronutrients required in large quantities by plants for vegetative growth, root development, and disease resistance respectively.