A number of substituted Schiff bases were synthesized and characterized by 1H NMR and mass spectrometry. These compounds were screened for antifungal activity in vitro against pathogenic fungi, namely, Sclerotium rolfsii and Rhizoctonia bataticola, and for their effect on nitrification inhibition under laboratory conditions. Maximum antifungal activity was exhibited by (2, 4-dichlorobenzylidene)-(2, 4, 5-trichlorophenyl)-amine and (3- ...