## Data Description
### Ghg  
Greenhouse gases concentrations are given in ppm (column F, G, H), with the flux in mg/h/m\({}^{2}\) (column I, J, K) for CO\({}_{2}\), CH\({}_{4}\), and N\({}_{2}\)O. Additionally given are the corresponding manure simulators (column A), trial numbers (column B), treatments (column C), manure sources (column D), and the number of days before or after applying treatments (column E). The GHG-GC analyzed each gas by its output peak area. By using standard calibration curves, the concentrations were calculated into parts per million (PPM). The same method was used to calculate the flux from the concentrations. An example of concentrations and fluxes of greenhouse gases are summarized in 'Manure Additives.xlsx' spreadsheet (Supplementary Materials, Sheet 'GHG'), as shown in Table 3. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Simulator \#** & **Trial** & **Treatment** & **Manure Sources** & **Time (day)\({}^{\star}\)** & **H\({}_{2}\)S** & **NH\({}_{3}\)** & **H\({}_{2}\)S Flux** & **NH\({}_{3}\) Flux** \\ \hline
1 & 1 & Triune & Deep pit 1 & \(-\)6 & 0.00 & 55.28 & 0.00 & 111.76 \\
2 & 1 & Confine & Outdoor storage & \(-\)6 & 0.50 & 41.48 & 0.91 & 75.80 \\
3 & 1 & Confine & Deep pit 2 & \(-\)6 & 0.50 & 72.85 & 0.84 & 122.84 \\
4 & 1 & Triune & Deep pit 2 & \(-\)6 & 0.00 & 69.51 & 0.00 & 136.74 \\
5 & 1 & MMP & Outdoor storage & \(-\)6 & 0.60 & 54.84 & 1.08 & 98.50 \\
6 & 1 & MMP & Deep pit 2 & \(-\)6 & 0.60 & 71.24 & 1.09 & 129.11 \\
7 & 1 & Sulfodox & Deep pit 1 & \(-\)6 & 0.40 & 130.48 & 0.73 & 238.73 \\
8 & 1 & Sulfodox & Deep pit 2 & \(-\)6 & 0.00 & 66.35 & 0.00 & 128.20 \\
9 & 1 & Control & Deep pit 2 & \(-\)6 & 0.70 & 105.99 & 1.32 & 200.38 \\
10 & 1 & Sulfodox & Outdoor storage & \(-\)6 & 0.60 & 17.47 & 1.11 & 32.40 \\
11 & 1 & Control & Deep pit 1 & \(-\)6 & 0.50 & 96.39 & 0.88 & 170.47 \\
12 & 1 & MMP & Deep pit 1 & \(-\)6 & 0.00 & 118.53 & 0.00 & 225.80 \\
13 & 1 & Control & Outdoor storage & \(-\)6 & 0.60 & 44.85 & 1.13 & 84.68 \\
14 & 1 & Triune & Outdoor storage & \(-\)6 & 0.00 & 50.54 & 0.00 & 98.63 \\
15 & 1 & Confine & Deep pit 1 & \(-\)6 & 0.50 & 97.70 & 0.93 & 181.10 \\ \hline \hline \end{tabular} \({}^{\star}\) Days prior to the application of manure additive are marked with negative (\(-\)) sign.  
\end{table} 
Table 2: An example of concentrations and fluxes of NH\({}_{3}\) and H\({}_{2}\)S summarized in ’Manure Additives.xlsx’ spreadsheet (Supplementary Materials, Sheet ’NH\({}_{3}\) & H\({}_{2}\)S’). \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline
**Simulator \#** & **Trial** & **Treatment** & **Mauure Sources** & **Time (day)** & **CO\({}_{2}\)** & **CH\({}_{4}\)** & **N\({}_{2}\)O** & **CO\({}_{2}\) Flux** & **CH\({}_{4}\)** & **N\({}_{2}\)O** \\ \hline
1 & 1 & Triune & Deep pit 1 & 2 & 799 & 42 & 0.226 & 377 & 74 & 1.068 \\
2 & 1 & Confine & Outdoor storage & 2 & 666 & 34 & 0.220 & 3148 & 60 & 1.040 \\
3 & 1 & Confine & Deep pit 2 & 2 & 578 & 10 & 0.220 & 2732 & 18 & 1.040 \\
4 & 1 & Triune & Deep pit 2 & 2 & 603 & 40 & 0.219 & 2851 & 70 & 1.035 \\
5 & 1 & MMP & Outdoor storage & 2 & 518 & 30 & 0.205 & 2449 & 53 & 0.969 \\
6 & 1 & MMP & Deep pit 2 & 2 & 438 & 16 & 0.216 & 2071 & 28 & 1.021 \\
7 & 1 & Sulfox & Deep pit 1 & 2 & 1223 & 94 & 0.207 & 5781 & 166 & 0.979 \\
8 & 1 & Sulfox & Deep pit 2 & 2 & 647 & 14 & 0.195 & 3068 & 25 & 0.922 \\
9 & 1 & Control & Deep pit 2 & 2 & 561 & 15 & 0.242 & 2652 & 26 & 1.144 \\
10 & 1 & Sulfox & Outdoor storage & 2 & 450 & 47 & 0.190 & 2127 & 83 & 0.898 \\
11 & 1 & Control & Deep pit 1 & 2 & 918 & 48 & 0.244 & 4340 & 85 & 1.154 \\
12 & 1 & MMP & Deep pit 1 & 2 & 1047 & 68 & 0.207 & 4949 & 120 & 0.979 \\
13 & 1 & Control & Outdoor storage & 2 & 433 & 30 & 0.225 & 2047 & 53 & 1.064 \\
14 & 1 & Triune & Outdoor storage & 2 & 582 & 39 & 0.207 & 2751 & 69 & 0.979 \\
15 & 1 & Confine & Deep pit 1 & 2 & 706 & 52 & 0.221 & 3337 & 92 & 1.045 \\ \hline \hline \end{tabular}
\end{table}