Fig. 3

The integrated effect of feldspar (FD), Filter cake (FC) treatments and their combinations with biofertilizer on soil reaction pH (A), Electrical conductivity (B), organic matter (OM) (C), available nitrogen (D), available phosphorus (E), and available potassium (F) (mg kg^− 1) after successive season 2021/2022. Where MBc(-) = Without biofertilizer (Bacillus cereus); MBc(+) = With biofertilizer (Bacillus cereus); Control = Non-fertilizer; 100FD = 100% Feldspar; 100FC = 100% Filer Cake; 75FD + 25FC = 75% Feldspar + 25% Filer Cake; 25FD + 75FC = 25% Feldspar + 75% Filer Cake; 50FD + 50FC = 50% Feldspar + 50% Filer Cake. The values shown in figure are means three replicates. Means followed by the same letters are non-significantly different (p ≤ 0.05)