Title: Test 1
Course: MC_AGRI1370_RWildhirt_NM06082017 > Section: Explain the types of variable rate irrigation (VRI) and their impact on row crop agriculture.

Q: During its peak growing period a corn plant will use approximately how many inches of water per day?
- .10”-.15”
- .30”-.35”
- 1.0”
- .70”-.75”
A: .30”-.35”

Q: During its peak growing period a soybean plant will use approximately how many inches of water per day?
- 1.00”-1.10”
- .20”-.30”
- .05”-.15”
- .60”-.75”
A: .20”-.30”

Q: ET is a term used in water management; what does the ET acronym stand for.
- Extra Terrestrial
- Even Transfer
- Evapotranspiration
- Equilibrium Total
A: Evapotranspiration

Q: How do you measure soil texture composition?
- Feel tests
- Ribboning tests
- Appearance Tests
- All the Above
A: All the Above

Q: Ideal moisture level for corn harvested for storage should fall into what range of moisture?
- 13-15%
- 20-25%
- 5-9%
- 1-10%
A: 13-15%

Q: Irrigation in which the water is not pumped but flows and is distributed by gravity is called?
- Side-roller
- Gravity
- Drip
- Surface
A: Gravity

Q: The arrangement of soil horizons in a soil is called this?
- Subsoil
- Soil Profile
- Master Horizon
- Organic Horizon
A: Soil Profile

Q: The stage at which the kernels begin to show a yellowish color on the outside is called what?
- Milk
- Dough
- Blister
- Dent
A: Milk

Q: The ___________ is the first leaves to emerge from the ground in a soybean plant?
- Unifoliate leaves
- Cotyledon leaves
- Trifoliate leaves
- Di-cotyledon leaves
A: Cotyledon leaves

Q: This growing stage occurs in corn when the silks are visible outside the husks.
- V1
- V6
- R5
- R1
A: R1

Q: This type of irrigation uses orifices, emitters, porous tubing, and perforated pipe to deliver water to plants.
- Sprinkler
- Center-Pivot
- Drip
- Traveling Gun
A: Drip

Q: Water will move quicker through which type of soil?
- Clay
- Sand
- Silt
- Loam
A: Sand

Q: Which factor does not affect crop growth during the season?
- Wind
- Sunshine
- Heat
- Direction of field
A: Direction of field

Q: Which type of soil has the smallest pores?
- Sand
- Silt
- Clay
- Loams
A: Clay

Q: An aquifer is an underground deposits of sand, gravel, or rock saturated with water.
- True
- False
A: True

Q: Hydrology is the science dealing with the waters of Earth – their distribution and movement on the surface and underground; and the cycle involving evaporation and precipitation.
- True
- False
A: True

Q: Many states and cities do not have any water restriction regulations/laws on how and when someone is able to apply water to their crops or lawn.
- True
- False
A: False

Q: Most soils have three major horizons – the surface horizon, the subsoil, and the substratum.
- True
- False
A: True

Q: The Ogallala Aquifer located mainly underneath the entire Central and West Central regions of the state, lies below nearly two-thirds of Nebraska and provides a dependable source of irrigation water.
- True
- False
A: True

Q: The Veris machine is a machine that producers use to test a soil’s electrical conductivity.
- True
- False
A: True

Q: Give one local or state law on water regulations.  Please explain why this law is in place.

Q: Water can move downward, sideways, and upward.  Explain the principle of how water can move each of these directions.

Q: Soils are comprised of three textures, often in combinations of two or more of these. List the three and explain how each affects water infiltration, water holding capacity, nutrient holding ability.

Q: When scheduling irrigation on row crops there are three water terms that are very important.  Explain these terms:

-Field Capacity

-Available Water

- Permanent wilting point