Irrigation Systems — Set 13

Correct Answer: A. Drip irrigation avoiding leaf wetting

The correct answer is Drip irrigation avoiding leaf wetting. Drip irrigation minimizes disease spread by avoiding leaf wetting, which is where many fungal and bacterial diseases germinate and proliferate. Delivering water directly to the root zone reduces humidity around foliage and decreases disease incidence, particularly beneficial for vegetables and fruits. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Significantly reduces yields and increases crop failures

The correct answer is Significantly reduces yields and increases crop failures. Inadequate irrigation causes water stress in crops, reducing photosynthesis, nutrient uptake, and biomass accumulation, resulting in significantly lower yields and higher crop failure risk. Ensuring adequate water supply at critical growth stages is essential for achieving potential yields and crop productivity. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Flat plains with clay soils near rivers

The correct answer is Flat plains with clay soils near rivers. Flood irrigation works best in flat plains with clay soils near rivers where gravity flow is possible and water retention is good. The Indo-Gangetic Plains, Narmada basin, and other alluvial regions are ideal for flood irrigation of crops like rice and wheat. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To test and demonstrate new irrigation technologies and practices to farmers

The correct answer is To test and demonstrate new irrigation technologies and practices to farmers. Irrigation trial plots serve as demonstration areas where new technologies, methods, and crop varieties are tested on a small scale before larger adoption. Farmers can observe results firsthand, build confidence, and decide whether to adopt innovations, facilitating technology transfer at community level. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Regular maintenance, desilting, and proper water allocation

The correct answer is Regular maintenance, desilting, and proper water allocation. Canal irrigation sustainability requires regular maintenance to prevent structural damage, desilting to maintain capacity, and equitable water allocation to ensure all farmers receive adequate supply. Community participation and proper management systems are essential for long-term viability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To capture and store runoff for irrigation and recharge groundwater

The correct answer is To capture and store runoff for irrigation and recharge groundwater. Surface water harvesting involves capturing and storing runoff through structures like ponds, tanks, and dams. It provides irrigation water, recharges groundwater through infiltration, reduces floods, and improves water availability during dry seasons, supporting agricultural sustainability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Solar-powered systems and water-saving technologies

The correct answer is Solar-powered systems and water-saving technologies. Solar-powered irrigation systems eliminate ongoing electricity or fuel costs, significantly reducing operational expenses. Combined with water-saving technologies like drip irrigation, farmers reduce water consumption and associated costs, improving profitability and sustainability of agricultural operations. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Increases irrigation coverage and agricultural productivity in new areas

The correct answer is Increases irrigation coverage and agricultural productivity in new areas. Expanding canal command areas brings new agricultural lands under irrigation, increasing cultivation intensity, crop productivity, and overall agricultural output. It enables cultivation of high-value crops, improves farmer income, and contributes to regional agricultural development and food security. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Proper drainage systems and controlled irrigation

The correct answer is Proper drainage systems and controlled irrigation. Preventing waterlogging requires well-designed and maintained drainage systems to remove excess water, along with controlled irrigation scheduling. Proper drainage prevents soil saturation, maintains aeration for roots, prevents salinization, and ensures healthy crop growth in irrigated areas. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Essential for food security, farmer livelihoods, and economic stability

The correct answer is Essential for food security, farmer livelihoods, and economic stability. Water security is fundamental to agriculture as it ensures reliable irrigation, stable crop production, farmer incomes, and food security. With growing competition for water and climate change impacts, securing adequate water through sustainable management is crucial for agricultural sustainability and national food self-sufficiency. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.