Flasks containing leachate are transferred to the laboratory. The leachate is filtered with glass fiber filters, stored in polyethelene vials, and frozen until analyzed for inorganic N and dissolved organic N using flow spectrophotometry. See Lysimeter installation diagrams and protocols for more details. 20 mL scintillation vials Procedure 1. Cover lysimeter flasks with parafilm to reduce particulate contamination during transport to field.
Place flasks in boxes and transport to field.
The center flasks will need to be inverted in order to fit 6 flasks in a box. Each lysimeter will have specific flask to be used for leachate collection. Place stopper assembly in flask. Connect hand pump to tygon tubing. Create a vacuum of 38 cm Hg with hand pump.