The Secret to Making a Compost Heap
Sometimes compost breaks down quickly into soil, but other times it takes so long that it doesn’t break down, making us feel bored and reluctant to do it again. In my first year at agricultural university, I also tried to make compost from straw at home the way the school taught. It took a whole year for it to become fertilizer. After I dumped it and went back to school, I left it there, and it decomposed very slowly. Let’s see what the key points are:
1. Carbon-Nitrogen Ratio
In composting, we need to understand that microorganisms are the most important players in the process of converting matter. These tiny insects, invisible to the naked eye, are the ones who do all the work from start to finish. Since they are living things, they need food to survive. Everything we put in the compost heap is their food, so that food must be in balance.
The two main ingredients are:
Carbon: The main source of food (like carbohydrates or rice for us).
Nitrogen: Provides energy and protein (like meat to us). Explained simply:
Brown matter = carbon (dry leaves, straw, etc.).
Green matter = nitrogen (fresh leaves, green plants, etc.).
Other materials that are high in nitrogen include chicken manure and cow manure. In a training course by an American teacher, they called it a “nitrogen bomb” by placing a large piece of meat in the middle of the compost pile. In our area, even a dead chicken or similar material can be placed in the middle. Brown and green matter should be placed in alternating layers. A ratio of 30:1 is very important.
2. Microorganisms
As mentioned above, microorganisms are the main workers. To incorporate them into the compost pile, they often use existing EM (Effective Microorganism) water. If not, we can use previously made compost or topsoil to add to it.
3. Moisture
Moisture is also important for the life of microorganisms and the decomposition process. The inside of the compost pile should not be too wet or too dry.
In the dry season, we need to water it more.
In the rainy season, we need to cover the compost pile tightly to prevent too much rain from entering.
4. Turning the Pile
Don’t think that just leaving the compost pile for 1 month, 3 months or 6 months will make it compost on its own. During decomposition, it will generate heat. If the heat is too high, the activity of microorganisms will decrease. Therefore, we should turn the compost pile from the bottom up every two weeks or at least once a month. If there is a lack of moisture, add water. If there is no sign of decomposition, add EM or IMO (local microorganism) water.
Internationally, compost made in this way is called “Black Gold”.
The reason is that compost is not only rich in nutrients, but it also helps to incorporate beneficial microorganisms that help fight plant and soil diseases. It helps to improve soil structure and adds organic matter that helps to retain moisture well.
These benefits, even expensive chemical fertilizers cannot provide, which is why it is called "black gold" or "black gold".
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