Irrigation and Drainage Engineering - Agricultural Engineering Previous Year Questions

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2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2026

A tubewell operating 10 hours per day discharges water at a rate of 25 m³ h⁻¹. The average irrigation depth is 80 mm, and irrigation interval is 20 days. If intensity of irrigation is 80%, the culturable command area (in hectares) is _____. (Rounded off to two decimal places)

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2

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Agricultural Drainage

Agricultural Engineering (AG) 2026

A tile drainage system having a drainage coefficient of 25 mm drains an area of 0.2 km². The average discharge from the system (in m³ s⁻¹) is _____. (Rounded off to three decimal places)

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3

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Groundwater Hydrology

Agricultural Engineering (AG) 2026

A well fully penetrates a 30 m thick confined aquifer. After a long period of pumping at a constant rate of 0.06 m³·s⁻¹, drawdowns of 3.6 m and 2.0 m are found at distances 60 m and 120 m away from the well, respectively. The hydraulic conductivity of the aquifer is n × 10⁻⁴ m·s⁻¹. The value of n is _____. (Rounded off to two decimal places)

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4

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Soil-Water-Plant Relationship

Agricultural Engineering (AG) 2026

An undisturbed soil sample is collected from a field with core cylinder having an internal diameter of 60 mm and length of 100 mm. The weights of moist soil and oven dried soil are 0.48 kg and 0.44 kg, respectively. Assuming density of water as 1000 kg·m⁻³, the water depth (in metres per metre depth of soil) is _____. (Rounded off to two decimal places)

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5

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Irrigation Water Conveyance and Application Methods

Agricultural Engineering (AG) 2026

Two rectangular channels, A and B, join to form a large rectangular channel, C. Each rectangular channel is lined with the same material and has the same bottom slope. The bottom widths of Channels A and B are 2 m and 1 m, respectively. If the flow depth in each channel is 2 m, the bottom width of Channel C (in m) is _____. (Rounded off to two decimal places)

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6

2026 · Agricultural Engineering · Irrigation and Drainage Engineering · Soil-Water-Plant Relationship

Agricultural Engineering (AG) 2026

The crop period is divided into four stages, initial, grand growth, mid-season, and late-season, with each stage spanning 25 days. The crop coefficient varies linearly from 0.4 at initial stage to 1.2 at mid-season stage. The reference crop evapotranspiration on 40th day is 8 mm. The corresponding actual crop evapotranspiration (in mm) is _____. (Rounded off to two decimal places)

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