### plant part | root:

Tree root
* Most tree roots absorb nutrients
* Some tree roots can destroy stones
  - cause damage
  - get food
  - water from the soil, making the soil drier and able to store more rainwater
* allow the soil to absorb more water, also reducing run-off.
* anchor the structure and provide water and nutrients
  - trees
* are able to obtain more nutrients from the soil when fungi are present in the soil
  - generally several degrees less cold hardy than tree stems
  - located in trees
  - part of the living body of the trees
* bind soil, preventing down-slope erosion during rains.
* can also be large accumulations of woody material
  - clog the soil absorption field
  - deflect water, leading to erosion and undercut banks
  - be a real menace, damaging sewers and causing sewers to plug
* can cause cracks in pipes and infiltrate causing major blockages
  - damage to underground wires
  - effectively exploit soil moisture even at relatively low soil-moisture contents
  - enter septic system lines and cause plugging
  - get into sewer lines through leaky pipe joints
  - grow continuously throughout the year, even in a climate with cold winters
  - make it difficult to install fencing or dig holes for new plants
  - penetrate the earth, therefore wool precede the earth
* can plug perforated field tiles, especially roots of wet-site trees such as poplar
  - up or divert sewage from receiving proper treatment
  - pose problems to property owners if surface roots lift driveways and sidewalks
  - withstand some submergence during the winter dormant period
* compete with grass roots for water.
* die, and water follows the roots until the dike gives way.
* dig deep into the ground, which helps to aerate, or provide oxygen to the soil.
* draw moisture from soils, causing shrinking and swelling.
* drink the water stored in the soil.
* enhance soil porosity, reduce compaction, and facilitate infiltration.
* establish themselves better if they are planted into the native soil.
* exploit large volumes of soil as their feeder roots grow.
* grow close to the soil surface
  - far beyond the original planting hole
* growing under and lifting sidewalks make walkways uneven and dangerous.
* help stabilize streambanks by holding soil in place.
* hold soil in place and increase water infiltration.
* hold soil in place, preventing erosion
  - reducing soil erosion
* increase water saturation into groundwater reducing water runoff.
* keep soil from washing away which makes streams and lakes cleaner.
* loosen and provide conduits through which water can enter the soil.
* need moisture.
* penetrate to great depths in the soil to obtain nutrients and moisture needed for growth.
* playa vital role in soil binding thus preventing soil erosion by wind or rain.
* prevent soil erosion.
* pull water from deep in the ground
  - either the unsaturated zone or the water table
* require oxygen for respiration as well as support and nutrient uptake
  - to develop and thrive
* seeking moisture can grow through cracks in the lines, causing a blockage.
* serve a variety of functions for the tree
  - many purposes
* soak up moisture very quickly drying out surrounding garden areas
  - storm water, hold soil in place on steep slopes, and trap pollutants
* spread in order to find a good supply of water.
* stabilize the soil and prevent erosion
  - to prevent erosion
  - soil, preventing wind and water erosion
* stay in the soil after trees are cut, holding the soil in place and preventing erosion.
* take up the insecticide and the plant moves it into stems and leaves.
+ Root: Plant anatomy
  * Roots are also very strong. Some tree roots can destroy stones. Roots are not green because the cells have no chlorophyll.
+ Tree, Parts of trees
  * Tree roots anchor the structure and provide water and nutrients. The ground has eroded away around the roots of this young pine tree.