Fig. 3. Effect of inhibitors and labeling of ammonium nitrate on enrichment of N2 as indicated by 
29R (a, b, c) and 30R (d, e, f). (LSD value is for comparing any two means at P = 0.05.)
Fig. 3. Effect of inhibitors and labeling of ammonium nitrate on enrichment of N2 as indicated by 29R (a, b, c) and 30R (d, e, f). (LSD value is for comparing any two means at P = 0.05.)