Build the pile in alternate layers of four to six inches of refuse and two inches of soil and manure. Fertilizer - One of the best sources of organic fertilizer is animal manure. Cow, chicken, rabbit, horse and mink are among the most readily available in many parts of the world. It is best to use them after they have had a chance to rot for a few years. They provide some plant nutrients, favorable bacteria, humus, better aeration and they help retain more moisture when they are mixed with your garden soil.
Manures are available from dairy farms, riding stables, poultry farms and mink ranches.
Usually you will have to pick them up from these sources, using your own truck. Sometimes firms that deliver soils or mulches will also stock and deliver one or two types of fresh or well-rotted animal manures. A check of the want-ad section of the newspaper will often reveal additional sources of supply. If you use fresh manures, they are best applied in the fall, as they are apt to burn or retard plants if they are applied during the spring, growing season. Well-rotted manures can be used in the spring.