organic matter

•  It is the fraction of the soil consisting of plant and animal residues in various stages of decomposition.

  soil organic matter
•  Soil organic matter contains carbon and nitrogen.   


  true
•  Carbon is the source of proteins for microorganisms in the soil


  false
• Nitrogen is the source of energy for microorganisms in the soil.


  false
• Available forms of nutrient are released through the process of decomposition.


  True
•  Humus is an inorganic material that has been converted by microorganisms to a resistant state of decomposition

  False
•  An organic material that has been converted by microorganisms to a resistant state of decomposition.

  Humus
• It is the most stable product of OM decomposition.

  Humus
• These are factors affecting the amount of SOM

  Temperature, Oxygen, Moisture
• These are functions of SOM on the physical properties of soil, except.

  Increase Bulk Density