ENVIRSC 2B03 Week 4 Midterm notes
study set 100% correct
What is gravitational water? - correct answer ✔The amount of water that can
be easily drained away by gravity (due to large pores not holding water as
tightly as small pores).
What is the term for the amount of water in soil accessible to plants? - correct
answer ✔The amount of water plants can extract from soil (since the plants
need to exert a force to extract the water stronger than the adhesion force
between water and soil) is called plant-available water or available water
storage capacity (AWSC), also known as capillary water.
What is the term for the water in soil that is held too tightly to be pulled out by
any force normally acting on a soil? - correct answer ✔Hygroscopic water.
What is field capacity? - correct answer ✔the amount of soil moisture or
water content held in the soil after excess (gravitational) water has drained
away and the rate of downward movement has decreased.
What is the permanent wilting point? - correct answer ✔The permanent
wilting point is the point at which soil moisture potential has dropped beyond
the plants ability to uptake water and the plant cannot recover and will wilt and
die.
What is soil water potential? - correct answer ✔It is quantified as the
difference between the potential energy of soil water and water in a reference
reservoir. The reference reservoir used to quantify soil water potential is pure
water at atmospheric pressure at a specified elevation.
study set 100% correct
What is gravitational water? - correct answer ✔The amount of water that can
be easily drained away by gravity (due to large pores not holding water as
tightly as small pores).
What is the term for the amount of water in soil accessible to plants? - correct
answer ✔The amount of water plants can extract from soil (since the plants
need to exert a force to extract the water stronger than the adhesion force
between water and soil) is called plant-available water or available water
storage capacity (AWSC), also known as capillary water.
What is the term for the water in soil that is held too tightly to be pulled out by
any force normally acting on a soil? - correct answer ✔Hygroscopic water.
What is field capacity? - correct answer ✔the amount of soil moisture or
water content held in the soil after excess (gravitational) water has drained
away and the rate of downward movement has decreased.
What is the permanent wilting point? - correct answer ✔The permanent
wilting point is the point at which soil moisture potential has dropped beyond
the plants ability to uptake water and the plant cannot recover and will wilt and
die.
What is soil water potential? - correct answer ✔It is quantified as the
difference between the potential energy of soil water and water in a reference
reservoir. The reference reservoir used to quantify soil water potential is pure
water at atmospheric pressure at a specified elevation.
