### ammonium:

Ammonium sulfate
* can help overcome water quality problems.
* comes in granular and liquid forms.
* contains nitrogen only in the ammonium form.
* good acid forming fertilizer.
* helps reduce the antagonism.
* is an excellent fertilizer which supplies sulfur as well as nitrogen to soils
  - crystal
  - formed and the acid is neutralized
  - inexpensive and effective
  - inorganic compounds
  - ionic compounds
  - produced by a flue gas desulfurization system
  - readily available, especially in eastern North Carolina
  - the most common source of N used on pasture grasses
* readily available form of sulfur fertilizer.
* stimulates root bud growth.

### amounts:

Smallness
* also correlates with school safety and a greater sense of personal efficacy.
* is amounts
  - size
  - the order of the day
* sharpens focus and fosters personal relationships.
* translates into limited resources.

### amphibians:

American toad
* American Toads are more land animals than aquatic animals.
* American Toads have dry, warty, reddish or brown skin with black spots
  - short limbs and they have webbed toes on their hind legs
  - inhabit grassy yards, forests, and meadows
* Most american toads eat earthworms
  - insects
* Most american toads have glands
  - poison glands
  - short legs
* Most american toads reach maturity
  - sexual maturity
  - thrive in habitats
* Some american toads emerge from hibernation
  - feed at nights
* Some american toads have conservation status
  - special conservation status
  - warts
  - live for years
  - shed skin
* are amphibians
  - large toads found in eastern North Dakota
  - responsible for controlling the populations of many kinds of insects
  - the most widespread and abundant toad in Ohio
  - true toads
* breed from once yearly.
* call in a long trill.
  - many species of pest insects and other invertebrates
* have a poison gland that is toxic if eaten, and can mildly irritate the skin
  - no special conservation status, as they are still common in most of their range
* have short legs, stout bodies, and thick skins with noticeable warts
* love burrowing so a deep substrate is important.
* occur in most of the eastern half of the United States and southern Canada.
* require a semi-permanent freshwater pond or pool for their early development.
* spend the spring breeding in shallow ponds.

### amphibians:

Common toad
* Most common toads hibernate during winter.
* Some common toads feed on beetles.
  - largely nocturnal
* can live for many years
  - produce irritations sensitive to people
* have a double string of eggs
  - poison glands which are irritating to the mouth of any predator
* prefer deeper water bodies in which to breed.
+ Common toad, Description: Toads
  * Common toads can live for many years. They have lived for fifty years in captivity. In the wild, common toads are thought to live for about ten to twelve years. Their age can be found by counting the number of yearly growth rings in the bones of their phalanges.

Amphidiploid
* are organisms
  - tetraploids with a complete diploid genome complement from each species parent
* is an organism
* originate by the formation of the hybrid at the diploid state.

Amphiprotic compound
* are also good buffers.
* buffer our blood.