Application of P-biofertilizer (Bacillus megaterium )and P-chemical fertilizers (rock phosphate and superphosphate) with and without organic farmyard manure   was studied in a 3-factor field  experiment on maize (Zea mays ). Factors being P-biofertilizer(B), P-chemical fertilizer(P) and  organic manure(M). Treatments being: B₀ (no-biofertilizer), and B₁ (P-dissolving B.megaterium bacteria),  P₀ (no P), P₁ (rock phosphate 70 kg Pha^-1) and  P₂(calcium superphosphate  35 kg P ha^-1),  M₀ (no manure), M₁ (24 Mg ha^-1) and  M₂ (48 Mg ha^-1). Treatment not receiving any material gave 3.62  Mg grains ha^{-1 .} Applying  any or more of the materials increased grain yield by as low as  1% by B₀P₀M₁  to  13% by  B₀P₀M₂   , up to 87% by B₁P₂M₀  and as high as 129%  by B₁P₂M_2..Increase main effects were: B = 40.4% ,  P = 25.6%  for P₁ and 20.0 % for P₂; although P₂  surpassed P₁ in presence of the biofertilizer  which enhanced soluble P-fertilizer.M=  5.1% for  M₁ and  20.0% for M₂ effictive in presence or in absence of  the biofetilizer. N,P,K,Fe,Mn,Zn and Cu residual in soil after harvest increased were by up to , 38,84, 42, 112, 269, 78, and 83 % for each respectively ; and highest availble contents were 91, 9.8, 308, 4.94, 1.55,1.51 and 0.42 mgkg^-1 for each respectively.