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Summary:

Management Modifiers on Decomposition Rate

The article discusses how tillage of cropland soil is represented in the model as an additional rate scalar that depends on tillage intensity, soil pool, and time since planting.

Key points:

• The tillage enhancement is strongest in the first 14 days after planting, weaker in the next 30 days, and weaker still in the next 30 days, becoming nonexistent after 75 days.
• The tillage decomposition rate scalars are provided in a table, showing the enhancement values for different soil pools (Litter 2, Litter 3, SOM 1, SOM 2, SOM 3) and two levels of tillage intensity (low and high).
• For example, the Litter 2 and Litter 3 pools have a decomposition rate enhancement of 1.5, 1.5, 1.1 for low tillage, and 1.8, 1.5, 1.1 for high tillage in the respective time periods (0-14 days, 15-44 days, 45-74 days).
• The SOM 2 and SOM 3 pools show the highest decomposition rate enhancements, especially in the first 14 days after planting.