Vocab & equations

How to calculate pure live seed

PLS % = (Purity % x Germination %)/100

Bulk seed needed (lb)

Desired PLS x area/PLS %

Rule of 70

Used to find when population doubles

70/percentage = number of years it will take for population to double

Autecology

study of individual organisms or individual species in relation to their environment

Synecology

studies interactions and relationships between different species and groups of organisms in a community/ecosystem (community ecology)

What is an island of fertility

- happens when soil nutrient distribution is strongly associated with shrubs
- localized beneath plant canopies. Areas between plants have almost no nutrients
- happen because of physical and biological processes

Ecological law that says that organisms survive between an ecological max and min in relation to environmental factors

Law of Tolerance

Order of the nitrogen cycle from atmosphere thru soil and back to atmosphere

Nitrogen fixation, ammonification, nitrification, denitrification

Deferred rotation grazing

rotates animals & rests specific pasture during its growth/seed set period

Rest rotation

animals rotated, 1 section rested for 1 yearSe

Seasonal suitability

rotation based off seasonal growth patterns, maturity & nutritional quality

Short duration

graze for short period but high density of animals

Best pasture

follow the green. Based off preciptation

The Presence or absence of an individual within a quadrat best describes?

Frequency

Infiltration

water entering the soil surface

Percolation

water moving within soil profile

Explain the pH scale

Lower number = more acidic. Higher number = more basic.

Numbers are on a log scale so 5 is 10x more acidic than 6.

EX: A soil with a pH of 5 is 1000x more acidic as a soil with a pH of 8. (8-5 = 3. Multiply 10 3 times: 10×10×10 = 1000)

Phenology

timing of life cycle or annual cycle events in relation to environmental cues