Answer:
Temperate deciduous forest
Explanation:
The temperate deciduous forest will have more organic matter concentration in it. 
Organic matter is a component of biological relics found in the soil. It makes up a significant portion of the soil. 
- Soil organic matter should not be confused with biomass production. 
- Rainforest due to its biodiversity is rich in organic biomass. 
- These organic matter decays rapidly due to the humid conditions, and are become lost. 
- Also, the rate of weathering in the rainforest is very high. 
-  This often washes and removes organic matter from the soil. 
- These conditions are not so in the temperate forest.