Irrigation Engi...

The ratio of the mean supply discharge in a canal during a period to its design full capacity is called

Match List I (Method of Irrigation) with List II (Types of Plantation) and select the correct answer using the codes given below:

List I	List II
P. Ring Basic Method	1. Cauliflower / cabbages
Q. Furrow irrigation	2. Jowar
R. Check irrigation	3. Potato
S. Drip irrigation	4. Orchid

Intensity of irrigation is the ratio of _____

The gross command area for a distributary is 5000 hectares, of which one-fourth area is identified as unculturable due to presence of ponds, roads and residential area. The intensity of irrigation of rabi and kharif season are 60 percent and 30 percent respectively.

The discharge required at the head of the distributary from average demand unidirections for the following data is ______

Crop season	KOR period	KOR depth
Rabi	4 weeks	13.5 cm
Kharif	2.5 weeks	19 cm

Farmland irrigated by the border flooding method is divided into a number of strips. For a strip of 0.05 hectares, the water for irrigation is supplied from a tube-well with a discharge of 0.025 cumecs. The infiltration capacity of the soil is considered to be 0.05 m/hour, the time required to irrigate this specific strip if the average depth of flow on the field is 10 cm is

A farmland consisting of fine textured soils is irrigated through ground water pumping. The ionic concentration of the ground water for Na⁺, Ca⁺² and Mg⁺² are 25, 4, and 2 milli-equivalents per liter respectively and the electrical conductivity is 200 micromhos per cm at 25° C. Compute the sodium absorption ratio (SAR) for the available source of irrigation water (rounded up to two decimal places).

In a cropped field, the following data are observed.

Moisture content at field capacity = 36%

Current moisture content = 24%

Dry density of soil = 1.5 Mg.m^-3

Effective root zone depth = 0.8 m

Conveyance efficiency = 80%

Application efficiency = 90%

To bring soil moisture content to field capacity, the depth of water to supplied for irrigation (in mm)will be ______.

The depths of penetrations along the lengths of a border strips at 20 metres apart were probed. Their observed values are 3, 2.7, 2.5, 2.2, 1.9, 1.5 metres. Compute the water distribution efficiency (%).