### structure | barrier:

Fence
* Most fences create physical barriers.
* Some fences consist of wire
  - effectively exclude coyotes but require careful maintenance
  - have wire
* Some fences keep animals
  - dogs
  - pigs
  - protect animals
* Some fences surround habitats
  - zoos
* also help keep out other wildlife that cause damage, such as rabbits and ground squirrels
  - work against adult pronghorns trying to escape from coyotes
* are a key component of success with livestock
  - barriers to restrict movement of livestock
  - borders
  - boundaries
  - different for the types of animals they contain
* are motivated by the goal of new radios
  - privacies
  - traders
  - walls
* attract birds, who sow weed and tree seeds.
* can act as a windbreak, break for drifting snow or glaring sun
  - migration barriers to antelope
  - create privacy, act as a shield from the weather or street noise, or screen an ugly view
  - help protect crops
  - limit damage from rabbits
* create barriers
* differ in function and purpose.
* do little to keep cats out.
* game for two players.
* have a visual and economic impact on properties and neighborhoods
  - posts
* includes bases
  - sections
* is useful for trimming or extending a large group of objects in one fell swoop.
* last for many years
* make it hard for animals to migrate or move to different habitats.
* noun used to modify post adjectivally.
* provide best results
* require periodic replacements
* surround entrances.

### structure | barrier | fence:

Electric fence
* Most electric fences create barriers
  - physical barriers
* Some electric fences consist of wire.
* are a common source of interference
  - animportant part of livestock grazing management
  - designed to create an electrical circuit when touched by a person or animal
  - much cheaper and easier to build than permanent fences
  - sometimes difficult to ground
  - useful for controlling the movements of wild animals
* can also keep coyotes out of an enclosed area
  - serve to deter squirrels
  - be very useful for keeping deer out of yards, fields, or gardens
* provide cross fences at a reasonable price.
* reduce mammalian predation on piping plover nests and chicks.
* scare off the predators, but they often kill birds.

### structure | barrier | fence:

Hedge
* Most hedges are easy to raise from cuttings, particularly low growing hedges.
* Some hedges still show signs of the ancient hedge-weaving tradition.
  * A 'hedge' or 'hedgerow' row of shrubs or trees. They are very close together. Some hedges are very old. Hedges can be used to separate fields. There are several plants that are used commonly in hedges. In many places a hedge cannot be taller than a certain number of feet.
* also incorporate a huge variety of grasses and ferns.
* are evasions
* are located in backyards
  - countrysides
  - rows
  - security
* block the progress of evil.
  - sections
* provide privacy and help to protect from the chilling winds of winter.
* require removals.
* rise up behind limestone walls of varying heights.

### structure | barrier | fence | hedge:

Shelterbelt
* are good for the soil, good for the environment and good for humanity
  - rows of trees to protect topsoil from wind erosion
  - the hens next to last choice for nesting
* can also minimize calf losses and make feeding operations easier.
* increase crop yields.
* prevent wind erosion in the summer and winter.
* protect fields from wind erosion and topsoil losses.
* reduce wind erosion and trap snow for water conservation.