NITROGEN

(See also Gas)

discovery: g66 3/22 22

explosives: g61 9/8 23

fixation in soil: ce 135; g77 10/22 20; g70 4/8 20; w67 39-40; w62 295; g61 9/8 21-22

nitrogen cycle: lp 83; g71 1/8 6

percentage in atmosphere: ce 135; g76 7/22 18; g70 4/8 20; g63 10/8 8; g61 9/8 21-22

water pollution: g72 7/8 29-30