2787)Which of the following methods of irrigation scheduling uses crop growth models?
Anonymous Quiz
33%
Soil moisture depletion method
24%
Plant-based approach
30%
Climatological approach
12%
Crop modeling approach
2788)What is the primary role of a soil moisture probe in irrigation management?
Anonymous Quiz
9%
To measure the infiltration rate of water
27%
To determine the water holding capacity of soil
6%
To measure the depth of water applied
58%
To monitor soil moisture and inform irrigation decisions
2789)What does "crop water stress" refer to?
Anonymous Quiz
0%
Excess water supply to the crops
78%
Reduced water availability causing poor plant growth
9%
Increased water absorption from the soil
13%
The loss of water from crops due to evaporation
2790)What is the main purpose of irrigation scheduling?
Anonymous Quiz
3%
To maximize water application
94%
To ensure water is applied at the correct time and amount
3%
To minimize crop water requirement
0%
To prevent water wastage
2791)In which irrigation scheduling method is soil moisture depletion most commonly applied?
Anonymous Quiz
61%
Soil moisture depletion approach
13%
Climatological approach
6%
Plant-based approach
19%
Evapotranspiration-based approach
2792)How does the "bookkeeping method" for irrigation scheduling work?
Anonymous Quiz
14%
It tracks the soil moisture level in the root zone
17%
It monitors plant water stress directly
17%
It calculates water loss based on evaporation
52%
It estimates irrigation water based on cumulative evaporation
2793)What does the "delta" of water refer to in the context of irrigation?
Anonymous Quiz
10%
The total amount of water required for irrigation
10%
The time required to irrigate a field
13%
The water required to bring a crop to maturity
67%
The total depth of water required during a crop's growing period
2794)What is the correct formula to calculate irrigation requirement (I.R.)?
Anonymous Quiz
10%
I.R. = WR + ER
77%
I.R. = WR – (ER + GW)
6%
I.R. = WR × ER
6%
I.R. = WR – ER
2795)Which of the following is NOT a method of measuring irrigation water flow?
Anonymous Quiz
16%
Water meters
28%
Orifices
50%
Tensiometer
6%
Parshall flumes
2796)What is the primary factor affecting the water requirements of crops in the climatological approach?
Anonymous Quiz
13%
Soil moisture retention
19%
Crop growth stage
65%
Evapotranspiration rate
3%
Water runoff
2797)How does the "Parshall flume" work in measuring irrigation water flow?
Anonymous Quiz
10%
By measuring the flow at the edges of an orifice
19%
By estimating the velocity of water using a float
71%
By forcing water through a narrow throat and measuring head loss
0%
By calculating evaporation from an open pan
2798)What is the main advantage of the "plant-based approach" in irrigation scheduling?
Anonymous Quiz
0%
It is based on soil moisture content
63%
It directly responds to plant water stress
3%
It requires minimal equipment
34%
It uses evaporation data to estimate crop water use
2799)Which of the following is an indicator of plant water stress?
Anonymous Quiz
3%
Increased leaf area
38%
Yellowing of the leaves
9%
Improved root growth
50%
Leaf wilting
2800)What is the "duty of water" used for in irrigation systems?
Anonymous Quiz
13%
To estimate water availability for the entire field
84%
To calculate the volume of water required to grow a specific crop
0%
To measure soil moisture levels
3%
To determine irrigation equipment efficiency
2801)What is the most common disadvantage of using water meters in irrigation systems?
Anonymous Quiz
12%
High installation cost
67%
Poor accuracy in low flow conditions
9%
Requires regular maintenance
12%
Cannot be used in open channels
2802)What is the main disadvantage of the "climatological approach" for irrigation scheduling?
Anonymous Quiz
15%
It requires highly accurate weather data
15%
It is only suitable for certain crop types
70%
It is complex to apply in areas with varied climate conditions
0%
It needs expensive equipment
2803)What is the role of "effective rainfall" in irrigation requirements?
Anonymous Quiz
94%
It contributes to the total irrigation requirement by reducing the amount of applied water
6%
It determines the efficiency of the irrigation system
0%
It increases the crop water stress
0%
It is unrelated to irrigation scheduling
2804)In which irrigation scheduling method is the rate of evaporation from an open pan important?
Anonymous Quiz
42%
Soil moisture depletion method
48%
Climatological approach
0%
Plant-based approach
10%
Volumetric method
2805)How does the "water diffusion resistance" of plants help in irrigation scheduling?
Anonymous Quiz
23%
It measures the speed at which water moves through the soil
13%
It indicates the degree of plant wilting
58%
It helps to predict when to irrigate based on plant's water stress
6%
It measures the amount of water vapor released by plants
2806)How does "leaching" affect the root zone in irrigation?
Anonymous Quiz
9%
It increases the nutrient concentration in the root zone
88%
It removes excess salts and nutrients from the root zone
3%
It decreases soil permeability
0%
It improves water retention in the soil