Seasonal Fluctuation of VAM Fungi on Six Commonly Cultivated Crops of Dharwad District in Karnatka

The Establishment Of Arbuscular Mycorrhiza (am) Fungi Was Recorded In Six Cultivated Crops. There Was A Seasonal Fluctuation Of Am Fungal Colonization In Root Bit And In Root Length On Jowar, Wheat, Safflower, Sugarcane, Pigeon Pea And Cotton. The Root Colonization And Amf Spore Numbers In Soil Samples Not Correlated With Each Other. Results Revealed That O.m. And E.c. Higher Or Lower Level Have No Influence On Colonization/Spore Number, On Contrary Higher P And N Concentration In Soil Reduced Root Colonization. It Shows, The Distribution Of Am Fungi Varied With Climate And Edaphic Environments As Well As Land Use Patterns Among Cultivated Crops.