Aboveground biomass
Before the pod color turned from green to brown or blank, each plant was
bagged loosely with a 1-mm nylon mesh to prevent seeds from splashing.
At maturity, 10 plants of each material were randomly selected and then
dried for one week at 70 °C, and total biomass was recorded using a
balance (PB602-N, Mettler Toledo, Nänikon-Uster, Switzerland).