SCSC 301 Exam 2 Correct 100%
ability of liquid to flow in narrow spaces without or opposing gravity -
ANSWERcapillary movement
attraction of water molecules to itself - ANSWERcohesion
attraction of water molecules to solid surfaces (soil, glass) - ANSWERadhesion
capillary movement in soil is due to? - ANSWERadhesion/cohesion
force of gravity on water pulling it downward - ANSWERgravitational force
water always moves from - ANSWERHIGH to LOW water potential (wet to dry)
where does matric potential occur? - ANSWERin micropores
how does matric potential cause water to move? - ANSWERmove in any direction
from wet to dry
is there greater capillary movement in sandy or clay soils? - ANSWERclay - moves
slower but farther
sand - moves faster but short distances
attraction of water to soil solids - ANSWERmatric force (capillary force)
attraction of water to ions and other solutes - ANSWERosmotic force
when ALL soil pores are filled with water - ANSWERsaturated
maximum water before ponding/flooding - ANSWERsaturated
saturated kPa - ANSWER0
% of water that remains once water has drained due to gravitational flow -
ANSWERfield capacity
how does osmotic potential cause water to move? - ANSWERmoves from low
solutes to high solutes
total soil water potential equation - ANSWERTotal = Gravitational + Matric + Osmotic
macropores are filled with air and not water - ANSWERfield capacity
field capacity kPa - ANSWER-10 to -30 kPa
ability of liquid to flow in narrow spaces without or opposing gravity -
ANSWERcapillary movement
attraction of water molecules to itself - ANSWERcohesion
attraction of water molecules to solid surfaces (soil, glass) - ANSWERadhesion
capillary movement in soil is due to? - ANSWERadhesion/cohesion
force of gravity on water pulling it downward - ANSWERgravitational force
water always moves from - ANSWERHIGH to LOW water potential (wet to dry)
where does matric potential occur? - ANSWERin micropores
how does matric potential cause water to move? - ANSWERmove in any direction
from wet to dry
is there greater capillary movement in sandy or clay soils? - ANSWERclay - moves
slower but farther
sand - moves faster but short distances
attraction of water to soil solids - ANSWERmatric force (capillary force)
attraction of water to ions and other solutes - ANSWERosmotic force
when ALL soil pores are filled with water - ANSWERsaturated
maximum water before ponding/flooding - ANSWERsaturated
saturated kPa - ANSWER0
% of water that remains once water has drained due to gravitational flow -
ANSWERfield capacity
how does osmotic potential cause water to move? - ANSWERmoves from low
solutes to high solutes
total soil water potential equation - ANSWERTotal = Gravitational + Matric + Osmotic
macropores are filled with air and not water - ANSWERfield capacity
field capacity kPa - ANSWER-10 to -30 kPa
