Irrigation Systems — Set 16

Correct Answer: A. Drip irrigation to reduce rapid water percolation losses

The correct answer is Drip irrigation to reduce rapid water percolation losses. Sandy soils have high infiltration rates and poor water retention, making them unsuitable for flood irrigation which leads to excessive percolation losses. Drip irrigation delivers water slowly directly to roots, matching soil water retention capacity and ensuring efficient water use in sandy soils. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Provides water security during unpredictable rainfall and droughts

The correct answer is Provides water security during unpredictable rainfall and droughts. Irrigation provides water security during climate-induced droughts and rainfall variability, enabling continuous crop production despite climate uncertainties. Combined with water-efficient technologies and drought-resistant varieties, irrigation strengthens agricultural resilience and supports climate change adaptation. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Wilting, reduced growth, and early maturity

The correct answer is Wilting, reduced growth, and early maturity. Water stress in crops is indicated by wilting leaves, stunted growth, reduced photosynthesis, early maturity with lower yields, and increased disease susceptibility. Monitoring these signs helps farmers time irrigation to prevent yield losses and maintain crop health. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Enables organic matter incorporation and microbial activity supporting soil biology

The correct answer is Enables organic matter incorporation and microbial activity supporting soil biology. Proper irrigation combined with organic matter addition (compost, manure) improves soil structure, microbial activity, water retention, and nutrient cycling. Regular irrigation and soil management create healthy, productive soil that supports sustainable crop production and reduces input needs. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Rainwater harvesting and artificial recharge of aquifers

The correct answer is Rainwater harvesting and artificial recharge of aquifers. Sustainable groundwater management involves artificial recharge (percolation pits, tanks) to replenish extracted groundwater, rainwater harvesting to reduce extraction, and monitoring water levels. These practices maintain groundwater sustainability and ensure long-term water security for agriculture. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Runoff reduces water availability and increases flood risk if not managed

The correct answer is Runoff reduces water availability and increases flood risk if not managed. Unmanaged surface runoff carries away water and topsoil, reducing water availability for irrigation and increasing erosion. Water harvesting structures like check dams, bunds, and terraces capture runoff, increasing infiltration and groundwater recharge while reducing flood risk. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Integrated water resource management and participatory governance

The correct answer is Integrated water resource management and participatory governance. Irrigation sustainability requires integrated water resource management balancing irrigation, drinking water, and industrial needs; participatory governance involving farmers; monitoring and regulation; investment in efficient technologies; and environmental protection. These comprehensive approaches ensure long-term irrigation viability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To optimize water allocation and prepare for seasonal water availability

The correct answer is To optimize water allocation and prepare for seasonal water availability. Irrigation forecasting and planning involves predicting water availability (rainfall, snowmelt, river flow), estimating water demand, and allocating water equitably among users. This proactive approach prevents conflicts, optimizes resource use, and ensures water security for agriculture throughout the year. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Decentralized management with farmer participation and accountability

The correct answer is Decentralized management with farmer participation and accountability. Modern irrigation governance emphasizes decentralized management through farmer organizations and water users associations, promoting transparency, accountability, and democratic decision-making. This participatory approach improves water distribution equity, increases system efficiency, and ensures sustainability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To ensure food security, farmer prosperity, and environmental sustainability

The correct answer is To ensure food security, farmer prosperity, and environmental sustainability. The ultimate goal of efficient irrigation management is to achieve food security through sustainable agricultural production, improve farmer livelihoods through better productivity and income, and protect environmental resources by conserving water. This triple balance ensures long-term agricultural and social sustainability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.