Soil organic matter (SOM) samples have charge that is pH-dependent, and measurements for the cation-exchange capacities (CECS) of soil organic matter average around 150 cmol(+)/kg SOM at neutral pH. Meanwhile, smectite clay minerals have CECS that average approximately 100 cmol(+)/kg clay. Since these two phases are the dominant contributors to soil CEC, we can use SOM content and smectite content (if we can measure it) to estimate total soil CEC. What would be your estimate for the total CEC (in cmol(+)/kg soil, to the nearest 0.1 cmol(+)/kg soil) of a soil that contained 3.28 % SOM and 1.0 % smectite clay by weight?
Soil organic matter (SOM) samples have charge that is pH-dependent, and measurements for the cation-exchange capacities (CECS) of soil organic matter average around 150 cmol(+)/kg SOM at neutral pH. Meanwhile, smectite clay minerals have CECS that average approximately 100 cmol(+)/kg clay. Since these two phases are the dominant contributors to soil CEC, we can use SOM content and smectite content (if we can measure it) to estimate total soil CEC. What would be your estimate for the total CEC (in cmol(+)/kg soil, to the nearest 0.1 cmol(+)/kg soil) of a soil that contained 3.28 % SOM and 1.0 % smectite clay by weight?
Chapter12: Water Requirements For Aquaculture
Section: Chapter Questions
Problem 7KA
Related questions
Question
100%
Transcribed Image Text:Soil organic matter (SOM) samples have charge that is pH-dependent, and
measurements for the cation-exchange capacities (CECS) of soil organic matter
average around 150 cmol(+)/kg SOM at neutral pH. Meanwhile, smectite clay
minerals have CECS that average approximately 100 cmol(+)/kg clay. Since these two
phases are the dominant contributors to soil CEC, we can use SOM content and
smectite content (if we can measure it) to estimate total soil CEC. What would be
your estimate for the total CEC (in cmol(+)/kg soil, to the nearest 0.1 cmol(+)/kg soil)
of a soil that contained 3.28 % SOM and 1.0 % smectite clay by weight?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Recommended textbooks for you