Steaming Compost

[bodnsoul]

It all has to do with the carbon:nitrogen ratio. the decomposers synthesize enzymes to break down materials, enzymes are protein based and require nitrogen to be produced. So a c:N ratio of 25:1 or better is needed for a decent heat up. The steam produced is rich in ammonia, which is notrogen based so the steam is venting of some nitrogen to the atmosphere, but it probably happens in a slower compost pile as well, just not so visably. This is also why adding carbon rich and nitrogen deficient organics to the soil can cause a period of nitrogen lockout. the decomposers in the soil borrow the N to sythesize enzymes and they are temporarily not available for the plants. No biggie though, just give it a few weeks to break down or add a high N fertilizer when you incorporate a carbon rich material.

 

[bills]

Bodnsoul has hit the nail on the head! Leaves, corn stalks, old hay, etc., use up a lot of nitrogen in the process of composting. Adding moisture to the pile during dry times is crucial as well. Many compost piles dry out, and this will slow down the process. Grass clippings are great, as they are usually quite moist, but don't forget to layer it with brown material.

The commercial products sold to speed up composting, are not much more than a very high nitrogen fertilizer.