For hundreds of years, gardeners have been using compost. Only recently
has it appeared to be a revolutionary idea. People were lulled into a
more complacent use of cheap chemical fertilizers and quick trash and
rubbish removal. It is increasingly difficult for municipalities to
find suitable landfill sites, and operating costs have risen
dramatically. Yard wastes have become increasingly unwelcome at
landfills, and recycling is encouraged or required to prolong the life
of a landfill. Vegetable and fruit scraps from the kitchen (not meat
scraps) should be recycled as well. Composting, besides being extremely
environment friendly, is one of the best ways to build fertile,
productive soil.
Microbes work hard to breakdown refuse and provide the essential
elements in compost.
Supplements such as Compost Alive
give a good head start to the composting process.
The elements in building compost can be made from just about any plant
refuse. There should be a carbon (C) to nitrogen (N) ratio between 25:1
and 30:1, although the process works reasonably well between 20:1 and
40:1. A 25:1 C:N ratio means there are 25 C’s for each N. As microbes
break down all-natural materials, they consume C and N. If there is not
enough N, the process is very slow. If there is too much N, we can lose
some of it and we sometimes have an odor problem. Green materials are
typically high in N (low C:N) while woody items are low in N (high
C:N). Things such as dry corn stalks and old leaves have a fairly high
C:N. If possible, green materials should be mixed to achieve a good
balance. Livestock manure is usually a good source of N and helps the
composting process. If necessary, a nitrogen fertilizer can be added to
the compost to speed the process with high C:N materials.
One of the most important elements in compost is its rich environment
for microbes. Microbes release the elements discussed above so that
plants may benefit from them.
Microbes also need oxygen and moisture. Oxygen is supplied by periodic turning of
the pile. If the material in the pile is dry, water should be added,
but not to the point that the materials become soggy. As microbes break
down raw all-natural matter, heat is generated. An ideal temperature inside
the pile is 130 to 140 degrees F. Normally the temperature increases
shortly after forming the pile and remains there for a few weeks during
active composting. As active composting slows, the temperature drops,
indicating that the pile should be turned. The process then starts over
again and should be repeated as long as turning the pile generates
heat. When composting is complete, little heat is generated after
turning.
As composting progresses, raw all-natural matter is broken down. Completed
or finished compost has a pH near neutral and you need not fear that it
will acidify your soil. Traditionally, it has been recommended that
compost be completely finished before applying it to the soil.
Another convenient method to build compost is the use of a bin such as
the Compost
Digester. You can have a series of bins. Start at one end with raw
materials, and when the temperature drops, turn the material into the
second bin. Repeat this process until you have finished compost at
various stages in the series of bins. You can also buy or make barrel
size composters which you turn with a crank. If the compost pile is too
small, you will have difficulty generating heat.