The question asks to identify the specific type of crop varieties that were instrumental in the Green Revolution due to their ability to produce significantly higher yields per unit area compared to traditional varieties. We need to evaluate each option based on its definition and historical context related to agricultural advancements.
B) High-Yielding Variety (HYV) seeds — These are crop varieties that have been selectively bred to produce significantly higher yields than traditional varieties when grown with appropriate inputs like water and fertilizers. They were the key technological innovation behind the Green Revolution, leading to substantial increases in food production, particularly in developing countries.
The question describes an irrigation method characterized by direct water application to the root zone, controlled quantities, a network of pipes and emitters, and minimal water wastage. We need to identify which irrigation technique matches this description.
B) Drip irrigation is the method where water is applied directly to the root zone of plants in small, controlled quantities through a network of pipes and emitters, thereby minimising water wastage. This technique is known for its high water use efficiency.
The question asks to identify the irrigation method that mimics natural rainfall by distributing water as fine droplets over crops. We need to evaluate each option based on its characteristic water delivery mechanism.
Correct Option: C) Sprinkler irrigation is the method where water is sprayed through nozzles, breaking it into fine droplets that fall over the crops, closely resembling natural rainfall. This method is efficient and suitable for uneven terrains and sandy soils.
The question asks for the collective term for naturally occurring substances of plant or animal origin that are added to soil to improve its fertility. We need to identify the option that correctly describes these substances.
Correct Option: B) Organic manure is the collective term for naturally occurring substances of plant or animal origin, such as compost, farmyard manure, and vermicompost, added to soil to improve its fertility. They enrich the soil with nutrients and organic matter, enhancing its structure and water retention capacity.
The question asks to identify the term for manufactured, nutrient-rich chemical substances like urea, superphosphate, and potash, which are added to soil to rapidly boost specific nutrients for plant growth. We need to evaluate each option based on its definition and common usage in agriculture.
Correct Option: A) Chemical fertilizers. This term accurately describes manufactured, nutrient-rich chemical substances like urea, superphosphate, and potash, which are used to rapidly boost specific nutrients for plant growth.
The question asks to identify the three primary macronutrients commonly found in chemical fertilizers, often abbreviated as NPK. This is a direct knowledge-based question related to agricultural science and plant nutrition.
Correct Option: A) Nitrogen, Phosphorus, and Potassium are the three primary macronutrients supplied through common chemical fertilizers, abbreviated as NPK. Nitrogen promotes leaf growth, Phosphorus aids in root development and flowering, and Potassium is essential for overall plant health and disease resistance.