This folder contains the data and R code for the article: Itoh T, Iwabuchi K, Maemoku N, Chen S, Taniguro K (2020) Role of ambient pressure in self-heating torrefaction of dairy cattle manure. PLoS ONE 15(5): e0233027. https://doi.org/10.1371/journal.pone.0233027 Contact: ITOH, Takanori (takanori@bpe.agr.hokudai.ac.jp) or IWABUCHI, Kazunori (iwabuchi@bpe.agr.hokudai.ac.jp) Fig1‒8.csv and Fig1–8.R are used to produce the Fig1–8 in the article. Note that the red field in Fig 1 was described using an Adobe Illustrator after producing Fig.1 eps file with Fig1.R code. Data_for_ANOVA.csv and Two-way_ANOVA.R are used to conduct a two-way ANOVA. If there was an interaction between the torrefaction temperature and ambient pressure, post hoc Tukey's HSD test (α = 0.05) was employed to evaluate differences in mean values among treatments. Feedstock.csv contains the properties of dairy manure used in the study. Definitions of variable headings are as follows; BY: biochar yield (%, dry basis); EY: energy yield (%); HHVdaf: the higher heating value (MJ/kg, dry and ash-free basis); HHVdb: the higher heating value (MJ/kg, dry basis); MC: moisture content (%, wet basis); VM: volatile matter (%, dry basis); FC: fixed carbon (%, dry basis); Ash: ash content (%, dry basis); C: carbon content (%, dry and ash-free basis); H: hydrogen content (%, dry and ash-free basis); N: nitrogen content (% dry and ash-free basis); O: oxygen content (% dry and ash-free basis). Note that the carbon, hydrogen, nitrogen, and oxygen contents are expressed on a dry and ash-free (daf) basis. You can convert it to a dry basis (db) using the following equation: C[%db] = C[%daf] * (1-Ash[%db]/100). Decarbonization, Dehydrogenation, and Deoxygenation are calculated according to the ash tracer-method described in the following article: Chen W-H, Du S-W, Tsai C-H, Wang Z-Y. Torrefied biomasses in a drop tube furnace to evaluate their utility in blast furnaces. Bioresour Technol. 2012; 111: 433–438. https://doi.org/10.1016/j.biortech.2012. 01.163