Healthy soil and sustainable growing

["ECO FINCA" <ecofinca@hotmail.com>]

Bacteria

Bacteria are single-celled organisms, and are the most numerous denizens of 
the soil, with populations ranging from 100 million to 3 billion in a gram.

They are capable of very rapid reproduction by binary fission (dividing into 
two) in favourable conditions.

One bacterium is capable of producing 16 million more in just 24 hours.

Most soil bacteria live in close proximity to plant roots and are often 
referred to as rhizobacteria.

Bacteria live in soil water, including the film of moisture surrounding soil 
particles, and some are able to swim by means of flagella.

The majority of the beneficial soil-dwelling bacteria need oxygen (and are 
thus termed aerobic bacteria), whilst those that do not require air are 
referred to as anaerobic, and tend to cause putrefaction of dead organic 
matter.

Aerobic bacteria are most active in a soil that is moist (but not saturated, 
as this will deprive aerobic bacteria of the air that they require), and 
neutral soil pH, and where there is plenty of food (carbohydrates and 
micronutrients from organic matter) available.

Hostile conditions will not completely kill bacteria; rather, the bacteria 
will stop growing and get into a dormant stage, or may mutate to adapt to 
the new conditions.

Gram positive bacteria produce spores in order to wait for more favourable 
circumstances, and Gram negative bacteria gets into a "nonculturable" stage.

http://en.wikipedia.org/wiki/Soil_life



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