Grassland productivity data across a gradient of invasive Pinus contorta abundance, northwest Patagonia, Argentina, 2020 - Moyano, J.; Zamora Nasca, L.B.; Caplat, P.; García Díaz, P.; Lambin, X.; Langdon, B.; Montti, L.; Pauchard, A.; Nuñez, M.A. (NERC EDS Environmental Information Data Centre, 2022)