Mitigation of CO2 and N2O Emission from Cabbage Fields in Korea by Optimizing Tillage Depth and N-Fertilizer Level: DNDC Model Simulation under RCP 8.5 Scenario
Round 1
Reviewer 1 Report
The manuscript reports an analysis of the implications of climate change on cabbage yield and CO2 and N2O emissions, under different farming practices. Cabbage is a minor crop, but the method assessed in this research could be applied to other crops. The manuscript is weak as regards the statistical analysis and does not provide significance levels. Besides the statistical part, the methodology is well explained and replicable. The results can provide some guidance for future farming. The references are rather few, and probably some more information about the model is needed. Overall, I think that after reviews, the manuscript would be suitable for this journal. Here are some specific comments:
Line 62: I suggest adding a reference for DNDC model.
Line 115: I suggest adding a reference for HadGEM3RA model.
Lines 187, 197, 201, 275, 306, 320, 322: check for spacing.
Line 205: there is a verb missing.
Line 215: did you established a threshold and/or a level of significance? You are mentioning some in lines 236-237, but it must be clarified in the “Method” section.
Line 219: you are providing the measure of precipitation in mm, but in table 1 the unit of measurement is in cm. Would it be more appropriate to use consistent unit of measurements?
Line 221: a reference is needed for “heavy precipitation days”. I suggest a couple of reference, or to refer to the Indices of Extremes of the European Climate Assessment & Dataset (https://www.ecad.eu//download/millennium/millennium.php#rain).
Zhang, X., W.D. Hogg, and É. Mekis, 2001: Spatial and Temporal Characteristics of Heavy Precipitation Events over Canada. J. Climate, 14, 1923–1936
Scoccimarro, E., S. Gualdi, A. Bellucci, M. Zampieri, and A. Navarra, 2013: Heavy Precipitation Events in a Warmer Climate: Results from CMIP5 Models. J. Climate, 26, 7902–7911
Line 278: what do you mean by “significant”? This comment is still related to the previous one about the statistical analysis. The level of significance must be clarified.
Lines 283, 310: something is missing within the brackets.
Check formatting of the tables.
Author Response
A file of revision note is attached.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
In the present manuscript, the DNDC model was used to predict the greenhouse gas (GHGs; CO2 and N2O) emissions and cabbage yields from 8072 cabbage fields in Korea in the 2020s and 2090s. Model outputs were tillage depth (three levels) and fertilization rate (three levels).
The results of the study are significant for suggesting low-carbon farming practices to mitigate greenhouse gas emissions and adapt to the ongoing climate change. Moreover, they could be used in other crops especially industrial or field crops which take over most of the agricultural land.
Author Response
A file of revision note is attached.
Author Response File: Author Response.pdf
