Do I really need to compost my manure or can I spread it as is?

The act of composting can be time-consuming and expensive when compared to spreading raw manure, but the extra effort will be worth it in the long run.

Raw manure is actually not an effective fertilizer source. When raw manure is spread onto pastures the nitrogen (N) content tends to volatilize and immobilize. The N in the pasture grasses will be 'sucked' up by the microbes into the compost in order for them to complete the composting process. Through the act of composting microbes recycle the nutrients they use and retain them in the compost.

Also, through spreading composted manure instead of raw manure you can protect local water resources. The run-off from raw manure can cause algal blooms in nearby streams, which depletes the stream of oxygen. As fish require oxygen to breathe they are not able to survive in this habitat. In addition, the run-off from manure piles can contaminate your drinking water supply and that of your horses' if they are located near a well.

Some of the other benefits to using composted manure instead of raw manure are:

• Increases water-holding capacity of your soil


• Kills parasite eggs/larvae and weed seeds


• Reduces odour


• Physically reduces the amount of waste produced


• Reduces the cost of hauling manure off-site


• Less money spent on chemical fertilizers and soil amendments


• Compost is easier to handle than raw manure


• Provides a great source of fertilizer for your pasture or garden.