Why is irrigation required in the sugar farming region?

• A. Annual rainfall about 2500 mm
• B. There is excessive rainfall during harvest
• C. Soil drains too quickly
• D. Annual rainfall 750-1000 mm

Answer: (D)

Sugarcane needs a lot of water, and farmers rely on irrigation when rainfall doesn’t consistently meet the crop’s water needs. An area that gets only about 750–1000 mm of rain each year typically experiences dry spells during key growth periods, so irrigation is used to keep the soil moist and prevent water stress, helping to maintain good yields. If rainfall were as high as 2500 mm, the crop would usually receive enough moisture from rain alone, so irrigation wouldn’t be needed. Excessive rainfall during harvest can cause flooding and hinder picking, not require irrigation. So the main reason irrigation is used here is because the annual rainfall is moderate and leaves a deficit that irrigation must fill.