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All we are doing when we make compost is putting back into the earth what we've taken out of it. It's easy! It can be as simple as mowing the lawn and leaving the clippings on--the green stuff is nitrogen! (Just be sure the clippings are small--if you've let the lawn get long and don't have a mulching mower, go back over the mowed area once or twice for the same effect.)
To understand the principles of composting, it will be helpful to understand soil matter. If you're out in the woods, for example, what you see on the top is leaves and decaying plant parts. Dig a little deeper and the material is less easy to identify, since visible and microscopic organisms have been busy digesting the organic matter. The end product is humus--food for the micro-organisms which release the nutrients for your plants. Once the easily eaten parts are gone, humus can last in the soil for centuries. It is this form of humus that improves the soil's structure and its ability to hold water and nutrients.
In making compost, the idea is to keep a balance of carbon (the "brown stuff" such as old leaves and stems) and nitrogen (the "green stuff" such as lawn clippings). You can also add raw kitchen scraps such as fruits and vegetables. No animal waste, meats, or cooked foods--or you may have larger guests than planned! Beetles and worms are a good sign--large scavengers are not.
Soil micro-organisms and plants need water, warmth, oxygen, moderate pH and the balanced supply of nutrients from the organic matter.
Sounding too technical?
When you build compost in a pile, think of lasagna. Add materials a few inches deep, then about a 6" layer of soil after each addition. Let it sit and you're making what's called "cold compost." On its own, it will take about a year--but you can have several piles going at once. Different textures allow more air circulation. Turning the pile will speed things up--which brings us to the other method, called "hot composting."
Hot composting is faster. The more a pile is turned, the faster you have your finished product. Turning, adding water, and balancing carbon and nitrogen encourages organisms to reproduce rapidly, causing the pile to heat up. The temperature in the center of the pile can reach 160° and can kill off weed seeds, disease organisms and roots.
Compost tumblers are popular because they work so quickly and are easy to turn. You can also make bins from large garbage cans and other containers. Make sure the bin is elevated for drainage, and punch holes in the side and bottom for air circulation. A larger bin (around 3' tall, wide, and deep) is better for getting best mass for proper composition--but the smaller bins will work.
Watching for problems
- Ants? That means the pile is probably too dry.
- Odor? It's too wet. Add more carbon (brown stuff) and turn to let in more air
- Seedlings sprouting? It's not hot enough. Avoid adding anything containing seed or make sure seeds are in the center of the pile.
No time and still want to do your part? If you have leftover salads, etc.--just dig a small hole and bury them. Or just fling an apple core or banana peel into the bushes!
Another method is to "compost as you go." When removing old plants, dead annuals, and such, just put them in little piles in an area where you will be working later. By the time you get to it, it's often starting to break down. You can work in what's left later or shake it off and discard or add larger pieces to your main pile. Anything we put back is enriching our soil.
For fun make compost tea. Put a shovelful of compost in a burlap bag. Tie it closed. Submerge in a bucket, garbage can, or other container with water. Put a cover on and let it steep a few days. Then pour around plants. Dilute to the color of weak tea and use as a foliar feed. Use the solids as mulch or put them back in the compost pile.
Sounds like too much? If you do not want all the work of composting yourself, but still want to help the soil naturally, try Dr. Earth products, with microbes already added. You can also mix them with your compost to help get it started. Whatever method you use will help your soil. |