WorksheetsALS: Plant and Soil Chapter 9
Total questions: 33
Worksheet time: 23mins
Water is considered the universal solvent
true
false
Normal precipitation remains steady throughout the year
true
false
Water is directly proportional to the surface area exposed to air.
true
false
Too little moisture can damage plants, but too much moisture is not a problem.
true
false
About 40 percent of all water that enters plants from the roots is give off during transpiration
true
false
Transpiration is driven by a tremendous drying force the atmosphere exerts on soil and plant surfaces, but evaporation is not.
true
false
The goal for irrigation managers is to convert water to ET and ultimately to yield.
true
false
Potential ET estimates crop weather use for the region around the weather station.
true
false
The feel method measures soil water more precisely than electrical resistance blocks.
true
false
When the chances of rainfall occurring shortly after irrigation are good, complete recharge of the root zone is not advisable.
true
false
Water is a gas vapor:
at 32 degrees F
at 212 degrees F or more
between 32 degrees F and 212 degrees F
at 100 degrees F or more
Which of these is a vital function of water?
It is responsible for cell turgor
It functions as a coolant and temperature buffer
It is a necessary constituent of all living plant cells and tissues.
All answers are correct.
Translocated water enables a plant to:
prevent transpiration
eliminate stiffness in plant cells
maintain the volume of the cytoplasm
neutralize chemical reactions
________ water bonds to soil particles.
Hygroscopic
Capillary
Gravity
All answers are correct
Which of these is NOT a factor controlling whether a crop ET is reduced below its potential rate?
soil water temperature
ability of soil to transmit water to plant roots
soil water content
actual evaporative demand
Using the bank account analogy for matching irrigation and rainfall amounts to crop ET, which of these is the withdrawal amount from the account?
rainfall
irrigation
ET
soil
Which of these is NOT one of the four basic methods of applying irrigation water?
furrow
spritz
sprinkler
drip
Sprinklers are found on:
hand lines
wheel lines
center-pivots
all answers are correct
The water molecule is (a) , having charged poles like a magnet
(a) allow gases to pass in and out of the leaf
Sometimes the only way to produce normal crops is to provide water artificially - to (a)
(a) is the water removed from soils by soil evaporation and plant transpiration.
Longer seasons produce more grain if the (a) and water supply are available.
Rainfall usually (a) the requirement for irrigation.
In drip or trickle irrigation systems, emitters are groups into two categories: line-source and (a)
(a) are mechanical instruments that measure soil water suction.
A (a) measures soil water content using a radioactive source.
(a) can be estimated from evaporation pan data, from weather data obtained at a nearby weather station, or from tables available through local agencies that calculate crop water use.
Thrive in very wet or flooded conditions
xerophytes
hydrophytes
mesophytes
fallow
transpiration
Grow in dry places
xerophytes
hydrophytes
mesophytes
fallow
transpiration
Plowed but not seeded.
xerophytes
hydrophytes
mesophytes
fallow
transpiration
Grow in moderately wet areas
xerophytes
hydrophytes
mesophytes
fallow
transpiration
Evaporation of water from leaf and plant surfaces.
xerophytes
hydrophytes
mesophytes
fallow
transpiration
