Incorporation of organic sources of nutrients in agriculture field has the potential to be a major factor in maintaining soil fertility and productivity. The present experiments were designed to evaluate the effect of different organic (biochar, legumes residues and humic acid) and inorganic amendments (NPK) on the growth and yield of maize and soil physico-chemical properties. The experiments consisted of organic and inorganic amendments namely: (1) Biochar (5 and 10 ton ha^-1), (2) legumes residues (5 and 10 ton ha^-1), humic acid (5 kg ha^-1) and NPK (full and half dose).  A controlled treatment was included in the experiments. All the treatments were replicated three times in RCB design at New Developmental Farm of the University of Agriculture Peshawar Pakistan during summer 2018-2019. Maize variety Azam and hybrid CS-220 were used in the experiment. Data were recorded on plant height, thousand grain weight, number of grains ear^-1, grain yield, and biological yield, soil organic C, soil total N and soil P after maize harvest. All the growth, yield and soil parameters were significantly affected by different soil amendments over control. During the course of the study it was noted that BC in combination with legumes residues and full doe of NPK increased maize thousand grain weight by 16% and 23% respectively over control. Moreover, humic acid at the rate of 5 kg ha^-1 in integration with half NPK increased maize thousand grain weight, grain yield and biological yield by 21%, 18 and 11% respectively which was statistically similar with the integration of humic acid with half NPK and half legume residues. On the other hand, integration of BC or legumes residues with half NPK improved soil P and organic C as compared to sole application of NPK or BC or legume residues. Integration of BC at the rate of 10 ton ha-1 in combination with half NPK resulted in 23 and 27% increase in soil P and C while 9 and 21% increase in soil P and C was observed in plots treated with half NPK and legumes residues. Overall, the integration of organic and inorganic source of nutrients resulted in higher yield and yield components of maize along with positive impact on soil properties and hence its recommended for improving maize yield and soil properties on sustainable basis.

Keywords: Biochar, Maize, Legumes, Yield and Humic acid