Lab Assignment Question 7

per kg of the total solids in the soil, 0.13 kg is organic matter

recall that bulk density is the mass of solids (kg oven dried soil) per m³ soil; i.e. there is no water in the pores as the sample has been oven dried at 105 ^oC for 24 hours (review bulk density determination in your lab manual) - thus in this case kg organic per kg soil is the same as kg organic per kg solids.

ChanheeeHwang, Eddy - you may also want to review the slide of mass / volume relationships in the lecture "Soil Physics - Solids (1)"