|Composting is the most natural form of recycling. Recycle yard
and kitchen wastes is a critical step in reducing the volume of garbage
needlessly sent to landfills for disposal. Home composting can divert
an average of 700 pounds of material per household per year. Composting
is easy and produces a high quality, inexpensive soil amendment. |
Compost is the ultimate garden fertilizer and best material
available to enliven your soil. It contains virtually all the nutrients
a living plant needs, and delivers them in a slow-release manner over a
period of years. Adding compost to your garden is a long-term
investment, helping to feed plantings for years.
Compost added to gardens improves soil structure, texture,
aeration, and water retention. When mixed with compost, clay soils are
lightened, and sandy soils retain water better. Mixing compost with
soil also contributes to erosion control, soil fertility, proper pH
balance, and healthy root development in plants.
Decomposition occurs naturally when organic remains
are attacked by microorganisms and invertebrates in
the soil, and it is decomposed to humus. Decomposition can be
encouraged by creating ideal conditions. Fast or "active" composting can
be completed in two to six weeks (versus typical 10 to 12
weeks). This method requires three key activities; 1) "aeration," by
turning the compost pile, 2) moisture, and 3) the proper carbon to
nitrogen (C:N) ratio. Attention to these elements will raise the
temperature to around 130F, and ensure rapid decomposition.
Almost any organic material is suitable for a compost pile. The
pile needs a proper ratio of carbon-rich materials, or "browns," and
nitrogen-rich materials, or "greens." Among the brown materials are
dried leaves, straw, and wood chips. Nitrogen materials are fresh or
green, such as grass clippings and kitchen scraps.
Mixing certain types of materials or changing the proportions
can make a difference in the rate of decomposition. Achieving the best
mix is more an art gained through experience than an exact science. The
ideal ratio approaches 25 parts browns to 1 part greens. Judge the
amounts roughly equal by weight. Too much carbon will cause the pile to
break down too slowly, while too much nitrogen can cause odor. The
carbon provides energy for the microbes, and the nitrogen provides
What to Compost
kitchen waste, including fruit and vegetable scraps, green
leaves (scraps stored in the freezer break down more quickly after
placed into the compost bin);
- lawn clippings (use thin layers so they do not mat down);
- chopped leaves (large leaves take a long time to break down);
- shredded branches;
- garden plants (use disease-free plants);
- shredded paper;
- weeds (before they go to seed);
- straw or hay;
- wood ash (sprinkle lightly between layers);
- tea leaves and coffee grounds;
- Manure (horse, cow, pig, sheep, goat, chicken, rabbit).
What Not to Compost
meat scraps and fatty trash;
- pet manures;
- too much sawdust generally slows the decomposition of the pile.
Troubleshooting guide -
enough air; pile too wet
pile; add coarse, dry materials (straw, corn stalks, etc.)
||Too many greens (excessive nitrogen/lack of
||Add browns (straw, paper or sawdust)|
|A compost pile has to heat up to breakdown
properly. If compost is not heating up properly, the reason(s) could
be that the pile is too small, not enough water, too much water, not
enough nitrogen, or lack of oxygen.
Finished compost is dark in color and has an earthy
smell (the smell of soil). It is difficult to recognize any of the original ingredients, although bits
of hard-to-decompose materials (such as straw) sometimes can be seen. If
the compost contains many materials which are not broken
down, it is only partly decomposed. Adding partly decomposed compost to the
soil can reduce the amount of nitrogen available to the plants. The microorganisms
will continue to do the work of decomposing, but will use soil
nitrogen for their own growth, restricting the nitrogen's availability to
plants growing nearby. If partly decomposed compost (large pieces)?are returned to the composter,
microorganisms will jump-start the composting process as new material
Compost will condition soil whether it is spread in a layer on
the soil surface or is dug in. A garden soil regularly amended with
compost is better able to hold air and water, drain more efficiently,
and contains a nutrient reserve that plants can draw on. Amended soil
also tends to produce plants with fewer insect and disease problems.
The compost encourages a larger population of beneficial soil
microorganisms, which control harmful microorganisms. It also fosters
healthy plant growth, and healthy plants are better able to resist
Add a small amount of compost to the planting hole of small perennial plants and annuals for future benefits.
To bolster poor soil with little organic matter, spread 2 to 3
inches of compost over a newly dug surface. Then work the compost into
the top 6 inches of earth.
A garden soil that has been well mulched and amended
periodically requires only about a 1/2 inch layer of compost yearly to
maintain its quality.
Composters everywhere are finding
enclosed composters make composting animal-free and convenient.
Compost kits help even
city-dwellers turn food scraps and leaf litter into rich compost.
Tumble composters eliminate hand turning and reduce composting time.