root biomass per pot half

Root foraging data for 37 plant species. The experiment was run in two years. Each row corresponds to a pot. In each pot, there was either no spatial gradient of nutrients, or shallow gradient or steep gradient (column "contrast"). Dry belowground biomass is reported for each half of the pot (root biomass content in the nutrients-poor half: column "lowconc_half_roots[g]"; root biomass content in the nutrients-rich half: column "highconc_half_roots[g]"); for pots with no gradient, identity of halves was chosen at random. Aboveground dry biomass and sum of the belowground halves are reported, too.