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How do you account for seasonal differences in mineralization, and crop rotation differences, with just one 10-day test?

One 10-day test cannot tell the whole story; the soil is too complex for that. Any differences could have simply been due to temperature differences, or differences in the residue quality of previous crops, or tillage differences. Although you did not find significant differences, the short time frame for the data limits its use.

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We would like to emphasise here that this study is about estimating the dollar value of key ES in agriculture. With limitations in the data availability, a snapshot of ES measurement was taken in 20 fields and limitations in field measurements are listed in the article. I agree that with improvements in measurement and multiple locations over the growing period of crops, we would be providing better estimates of each ES and hence reflect better estimation of their economic value.

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