This intensive study plot is located in Villenave d’Ornon, near Bordeaux in southwestern France (44.788319 N, -0.577062 E). It includes the INRAE chestnut germplasm collection and all isolated trees located in the immediate surroundings (< 1 km from the INRAE research site). The germplasm collection is distributed in two nearby orchards. The first orchard was planted in 1970 and comprises 29 widely spaced trees on 2.3 ha while the second orchard was planted in 1990 and includes 211 trees on 3.5 ha. In contrast to the Asiatic chestnut species, the European chestnut is very vulnerable to blight and ink diseases originating from Asia (Gonthier and Robin 2019). Cross-breeding between Asiatic species and European chestnut has been carried out to select new tolerant hybrid cultivars (Barreneche et al. 2019), some of which have been massively planted for fruit production. Hence, the two orchards include different taxa: 117 C. sativa (European chestnut), 22 C. crenata (Japanese chestnut), 20 C. mollissima (Chinese chestnut) and 81 interspecific hybrids, including 56 C. sativa x C. crenata. In some cases, both parental trees and their offspring are found in the orchards. Most trees are grafted on both rootstocks: Marsol (CA07) or Maraval (CA74). Pollination and hence pollen limitation are still poorly understood in chestnuts (Larue et al. 2021a).

A harmonized, comprehensive meteorological time series for 78 German intensive forest monitoring plots (Level II) has been made available from 1961-2019. The used hybrid spatial interpolation routine using simple linear regression and inverse distance weighting allows for gap-filling of missing data and also for extrapolation outside measurement period to analyze long-term effects of climate on forest ecosystems.

The dataset provides digital dendrometer measurements on stem circumference of irrigated and non-irrigated Pinus pinea trees. Data were obtained in a xeric non-native habitat of central Chile. Forest mensuration were hourly collected from six adult trees during a growth year.

The TreeTrace_Douglas database includes images and measurements at several steps of the processing of Douglas fir logs from the sawmill logyard to the machine grading and destructive testing of boards. A total of 52 long logs, 156 short logs, 208 wood discs and 346 boards were analysed. The image data includes RGB images of log ends and board ends, RGB images and CT slices of strips, a set of images of the boards (RGB, laser and X-rays) obtained with an industrial board grading machine. The measurements include wood local density, growth ring widths, pith and board location in the logs, heartwood and sapwood areas, mechanical properties of each board obtained by vibratory and static testing, and visual grading of the boards.