ठिबक सिंचन पद्धती अवलंबविल्यास पाण्याची किती टक्के बचत होते ?

The correct answer is Option D (40 to 70%).

Key Points:
• Core Concept
• Micro-irrigation, specifically drip (trickle) irrigation, applies water directly to the root zone of plants drops by drop through emitters, drastically minimizing evaporation and deep percolation losses.
• Why Correct
• Conventional flood irrigation exhibits water application efficiency of only 30-40%.
• Drip irrigation raises water use efficiency up to 85-90%, resulting in net water savings of 40% to 70% compared to traditional surface flooding depending on soil and crop conditions.
• Key Details
• Beside water conservation, drip irrigation reduces weed growth, controls soil salinization, and enables fertigation (applying dissolved fertilizer via irrigation water).
• Exam Traps
• Be cautious of narrow percentage intervals like 30-40% or 40-50%, which represent partial savings under specific sub-optimal conditions. The standard broad benchmark recognized by agricultural authorities is 40 to 70%.
• Other Options
• Options 1, 2, and 3 underestimate the full water-saving potential of drip irrigation systems.
• Key Takeaway: Implementing drip irrigation saves between 40% to 70% of water compared to conventional surface irrigation.