A global dataset of specialty crop biomass and N2O emissions

We reviewed global field studies of vineyard, orchard, and vegetable cropping systems, which were also included in a meta-analysis (https://doi.org/10.1111/gcb.17233). We narrowed down the studies to those with field measurements of adequate variables (biomass C, N, and N2O) covering at least one growing season. As a result, seasonal and/or annual N₂O emission measurements, along with biomass data of different plant organs from the same regions, were compiled for grape (Vitis vinifera), almond [Prunus dulcis (Mill.) D.A. Webb], peach (Prunus persica L.), walnut (Juglans regia), lettuce (Lactuca sativa), broccoli (Brassica oleracea var. italica P.), cauliflower (Brassica oleracea var. botrytis L.), and tomato (Lycopersicon esculentum L.) planting system. These observations were collected from fields spanning seven Koppen-Geiger climate types and five countries (the United States, Germany, Spain, France, and Australia). When only dry mass was measured, biomass C content for aboveground vegetable crops and berry fruit was assumed at 43%; nut fruit and woody organs of orchard tree at 48%. Area-weighted averages of N2O emissions were used (tree/vine row and interrow).

Corresponding author: Mu Hong ([e-mail])