Raw data on initial soil, forest floor, and trial details for the accelerator trial series (FR556) in Pinus radiata stands in New Zealand

<br><i>Authors:</i> Simeon J Smaill¹, Loretta G Garrett² and Sarah Addison²<i>Affiliation: </i>¹ Scion, PO Box 29237, Riccarton, Christchurch 8440, New Zealand; ² Scion, Private Bag 3020, Rotorua 3046, New Zealand.<br>A data set from the Accelerator trial series (FR556) spanning 6 <i>Pinus radiata</i> forest sites in New Zealand. The data set includes initial, pre-harvest and time-zero, data on soil and forest floor and trial sub-plot details. The dataset links to the Data in Brief publication Smaill et al., (2023) which describes the sample collection and testing methods. Trial ID (e.g. FR556/1) is an individual trial identification allocated to a trial site and the PSP ID (e.g. FR556/1/1) is an individual ‘Permanent Sampling Plot’ identification allocated to a measurement plot area – both are allocated by Scion’s (New Zealand Forest Research Institute Ltd) forestry trials and permanent sampling plot databases.The data includes one file with 9 data sheets and 3 data folders:· 1_Pre-harvest soil chemistry – data by PSP ID and sample depth collected from adjacent to or within the Accelerator trial area. Data includes sampling date, sampling method and soil chemical analysis on the &lt;2 mm soil fraction.· 2_Pre-harvest soil bulk density – data by PSP ID and sample depth collected from adjacent to or within the Accelerator trial area. Data includes sampling date, sampling method and soil bulk density for &lt;2 mm and &gt;2 mm (mineral and organic) soil fraction.· 3_Pre-harvest soil microbial – data by PSP ID and sample depth collected from adjacent to or within the Accelerator trial area. Data includes sampling date, sampling method and soil micro-respiration responses to added substrates.· 4_Pre-harvest forest floor – data by PSP ID and sample type (fresh litter (L) and partly and well decomposed litter (FH), (&lt;10 cm diameter)) collected from adjacent to or within the Accelerator trial area. Data includes sampling date, sampling method, forest floor mass and chemistry analysis.· 5_Accelerator trial sub-plot details – by each PSP ID including block, plot and sub-plot ID, treatment ID and treatment at time zero, planting stock ID, slope, elevation, and slope direction.· 6_Time zero soil chemistry – data by permeant plot sample (PSP) ID and sample depth collected from a sub-set of PSP’s for the Accelerator trial. Data includes sampling date, sampling method and soil chemical analysis on the &lt;2 mm soil fraction.· 7_Time zero soil bulk density – data by PSP ID and sample depth collected from a sub-set of PSP’s for the Accelerator trial. Data includes sampling date, sampling method and soil bulk density for &lt;2 mm and &gt;2 mm (mineral and organic) soil fraction.· 8_Time zero soil microbial – data by PSP ID and sample depth collected from a within the Accelerator trial area. Data includes sampling date, sampling method and soil micro-respiration responses to added substrates.· 9_Time zero soil profile – data by PSP ID collected from a sub-set of PSP’s for the Accelerator trial. Data includes soil horizon description and New Zealand soil classification.· Folder FR556_MIR spectra: FR556 trial soil Mid-Infrared spectra opus files by sample ID.· Folder FR556_MIR spectra_csv: FR556 trial soil Mid-Infrared spectra csv files by sample ID.· Folder FR556_soil profile images: FR556 trial soil profile image files by trial site ID.Contact: Loretta Garrett ([e-mail])<b>Acknowledgments</b>Funding to publish the data came from the Resilient Forest program, which is funded by New Zealand Ministry of Business, Innovation &amp; Employment (MBIE) Strategic Science Investment Fund, and in part by the New Zealand Forest Growers Levy Trust (C04X1703). Data collection was funded by the “Growing Confidence in Forestry’s Future” research programme, which is jointly funded by the New Zealand Ministry of Business Information and Employment (MBIE) and the New Zealand Forest Growers Levy Trust (C04X1306). Funding for the soil spectroscopy testing came from the Resilient Forest program (C04X1703) and the Tree-Root-Microbiome programme, which is funded by MBIE’s Endeavour Fund and in part by the New Zealand Forest Growers Levy Trust (C04X2002).<b>References</b>Smaill, S. J., Garrett, L. G., &amp; Addison, S. L. (2023). Accelerator trial series in Pinus radiata stands in New Zealand: Trial establishment, site description and initial soil, forest floor and tree data. Data in Brief, 47, 108991. https://doi.org/https://doi.org/10.1016/j.dib.2023.108991 <b>Disclaimer</b>We make no warranties regarding the accuracy or integrity of the Data. We accept no liability for any direct, indirect, special, consequential or other losses or damages of whatsoever kind arising out of access to, or the use of the Data. We are in no way to be held responsible for the use that you put the Data to. You rely on the Data entirely at your own risk.