I want to artificially create soil organic carbon gradient in a soil by mixing externally applied organic matter for one of my pot-culture study. pH, SOC content and clay content of my soil are 7.4, 0.62% and 52%.
What is the best way to do that so the quality of organic carbon (once the system reaches its equilibrium) closely matches the natural soil organic carbon?
What should be the best source of organic matter for this purpose?
What should be the time for for reaching equilibrium?
How to make sure that the final SOC content reaches an expected value?
I don't know the answer. However, the organic products from digestion of sewage or manures may be close to what you want because these fractions are much more resilient than fresh biomass.
Paul Milham Sir, thanks for your answer.
I was wondering, what is the extent of digestion that you are referring to?
Creating SOC Gradient: The best way to create a SOC gradient is to mix externally applied organic matter into the soil1. This can be done by adding different amounts of organic matter to different sections or layers of the soil. The organic matter will decompose over time, contributing to the SOC content.
Raghad Mouhamad , thanks for your answer.
Can you please refer me any study where the researchers had created an artificial gradient of SOC?
I was on the periphery of a series of studies in New South Wales, Australia, on the use of composted sewage sludge on soil properties and productivity. Unfortunately not much was published.
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