Mod 7 Basin Irrigation Method and Its Design
Mod 7 Basin Irrigation Method and Its Design
Mod 7 Basin Irrigation Method and Its Design
9. Flooding an entire field with water and letting the water soak in evenly.
a. drip irrigation b. basin irrigation c. furrow irrigation d. spray irrigation
10. Which one of the following does not contribute water logging?
a. Adequate drainage b. Seepage from unlined canals
c. Frequent flooding d. Excessive tapping of ground water
13. With basins on sloping land, where terraces are used, when the irrigation water is supplied to the highest
terrace, and then allowed to flow to a lower terrace and so on is called
a. Direct method b. cascade method c. siphon method d. gravity method
14. Over-irrigation happens if too much water is supplied to a basin. The effects are:
a. The percolation losses are high, b. the plant nutrients are washed away and,
c. on clay soils, the plants may even drown. d. AOTA
20 The vertical distance from the water surface to the lowest elevation at w/c water would flow over the field
A. Freeboard b. free board c. blackboard d. AOTA e. NOTA.
Permanent bunds usually have a base width of 130-160 cm and a height of 60-90 cm when constructed. The
settled height will be 40-50 cm.
29 Ideally, the slope of the farm for basin irrigation is about ____%.
a) 0.1 b) 1 c) 2 d) 3
30 Ideally, the percentage slope recommended for border irrigation of the farm is more than ____
A) 0.1 b) 1 c) 2 d) 3
34. Prolonged liberal irrigation of agricultural fields is likely to create the problem of
A. Acidity B. Aridity C. Salinity D. Metal toxicity
35. A farmer's crop is repeatedly getting infected from a fungal disease. The soil in which crop is sown is clayey.
Which of these irrigation methods would lessen the chance of infection?
A. Furrow irrigation B. Drip irrigation C. Basin irrigation D. Sprinkler irrigation
38 Sandy soils are not suited to basic irrigation because they have
A. many macropores b. many micropres c.good aeration d. good soil structure e. low infiltration rate
45 The term used when too much water is aplied to the basin
A. Excess irrigation b. over-irrigation c. more irrigation d. suficient irrigation
47 Width of terraces in border irrigation varies from ___ for 4% land slopes to ____ for 0.1% landslopes
A. 1.5 m, 150 m b. 7 m, 80 m c. 4 m, 90 m d. 5 m, 100 m
terrace width varies from 1.5 m for 4% land slopes to 150 m for 0.1% land slopes
50 When forming dikes manually, soil should be taken from the ______ side of the dike
A. Downhill b. uphill c. at both sides d. at the middle.
52 The method of irrigating basins when wateris supplied to the highest terrace and then allowed to flow to lower
terraces is called
A. Overflow b. cascade c. streamflow d. runoff
POST TEST
2 This irrigation system is usually long (can be up to 800 m or more), uniformly graded strips of land,
separated by earth bunds is called ____ irrigation method.
a) Border b) Check Flooding c) Basin Flooding d) Drip
4 This irrigation system is practiced whereby the field is divided into strips by parallel ridges or dikes
and each strip is irrigated separatey by introducting water upstream.
a) Border b) Basin c) Drip d. sprinkler
less suited to small-scale farms involving hand labour or animal-powered cultivation methods
a) Border Flooding b) Check Flooding c) Basin Flooding d) Drip Irrigation Method
2 This irrigation system is usually long (can be up to 800 m or more), uniformly graded strips of land,
separated by earth bunds.
a) Border Flooding b) Check Flooding c) Basin Flooding d) Drip Irrigation Method
4 This irrigation system is less suited to small-scale farms involving hand labour or animal-powered
cultivation methods
a) Border Flooding b) Check Flooding c) Basin Flooding d) Drip Irrigation Method
6 the minimum slope for border should be uniform, with a minimum slope of
A) 5% b) 0.5% c) 2% d) 0.05%
7 the maximum slope for border should be uniform, with a minimum slope of
A) 5% b) 0.5% c) 2% d) 0.05%
A) 60 m b) 70 m c) 80 m d) 90 m
A. 60 m b) 70 m c) 80 m d) 90 m
10 the maximum lenth for border when soil is clay
A) 60 m b) 90 m c) 180 m d) 300 m
12 the maximum slope for a sandy soil for border irrigation should be
A) 0.2% b) 0.4% c) 1% d) 0.05% e) 0.6% f. NOTA
13 the maximum slope for a clayey soil for border irrigation should be
A. 0.2% b) 0.4% c) 1% d) 0.05% e) 0.6% f. NOTA (2.0%)
14 the maximum flow for a clayey soil for border irrigation should be ____ liters per second
A) 1-2 b) 3-4 c) 4-6 d) 8-10 e) 10-15 f. NOTA
15 the maximum flow for a sandy soil for border irrigation should be ____ liters per second
B) 1-2 b) 3-4 c) 4-6 d) 8-10 e) 10-15 f. NOTA
B) 60 m b) 70 m c) 80 m d) 90 m e) 300 m f) NOTA
A) 30 m b) 60 m b) 70 m c) 80 m d) 90 m e. NOTA
A) 30 m b) 60 m b) 70 m c) 80 m d) 90 m e. NOTA
20. The part of the irrigation system where excess water has to move out
Post test:
1. In w/c type of irrigation method the entire land is not wetted?
a) Furrow Method b) Free Flooding c) Contour Farming d) Basin Flooding
2. Slopes preferred for furrow irrigation
a. Uniform or flat b. gentle slopes c. steep slopes d. a and b e. AOTA
3. Generally, slopes of furrows should not c
a) 0.01% b) 0.05% c) 0.5% d)5%
4. Generally, slopes of furrows should not exceed the slope as answered in question no. 3, to
A. Increase infiltration rate b. avoid soil erosion c. assist drainage d. AOTA
5. Although furrows can be made in uniform of flat lands, the minimum slope is
a) 0.01% b) 0.05% c) 0.5% d)5%
6. For clay soils, the recommended furrow should be
A. Wide b. shallow c. deep d. narrow
7. For sand soils, the recommended furrow should be
a. Wide b. shallow c. deep d. narrow
8. The maximum furrow length for furrows made at 0.5% for clay soils is
a) 110 m b) 130 m c) 150 m d) 200 m bonus’; 500 m
9. The maximum furrow length for furrows made at 0.5% for sandy soils is
b) 110 m b) 130 m c) 150 m d) 200 m ans, bonus: 250 m
10. The maximum stream size for furrows made at 0.5% is ____ liters per second
1.2 b) 1.3 c) 1.5 d) 2.0 b
POST TEST
3. Old folks used burried clay pots with water. Water moves to the root zone by
a. Gravitational force b. capilllary force c. external force d. field capacity force
7. The final stage of delivery of water in drip irrigation system applying water directly to the root zone
of the plant is called
a. Emitter b. dripper c. lateral d. main pipe e. ball valve
8. This essential part of the drip irrigation system is used to prevent clogging of drippers
a. Filtration b. pump c. flush -valve d. end stop
9. In all irrigation systems, drip irrigation is the most efficient because of reduced
a. evaporation from soil b. percolation losses c. runoff
4. The small drops usually fall close to the sprinkler whereas the large ones travel much
a. True b. false
10. The process of combining pesticides with the irrigation water is called
a. Chemigation b. fertigation c. fertilization d. pestigation