Integrated application of organic and inorganic fertilizers enhances soil fertility to increase soil nitrogen, phosphorus and potassium concentration. The aim of this experiment was to investigate the combine effect of manures and mineral fertilizer on soil NPK status under wheat Mung bean cropping system. The research was conducted at Livestock Research and Development Station Surezai, Peshawar in two years filed trials in 2010-11 and 2011-12 in randomized complete block design with four replications. In this experiment three levels of poultry manure (2, 4 and 6 t ha^-1) three levels of farmyard manure (2, 4 and 6 t ha^-1) and two levels of nitrogen (60 and 90 kg ha^-1) along with control were applied to wheat crop.  Mungbean was cultivated on the same plots after harvest of wheat without application of any fertilizers. Soil analysis for % nitrogen, phosphorus and potassium was done before and after the harvest of each crop. Poultry manure, farmyard manure and nitrogen significantly affected soil NPK content.  The results showed that organic manures and inorganic fertilizers in combination used soil % nitrogen from (0.04 %) to (0.076), phosphorus from (6.0 mg kg^-1) to (10 mg kg^-1) and potassium from (75 mg kg^-1) to (101.68 mg kg^-1).

Key words: Inorganic fertilizer, organic fertilizers, cereals, fertility and sustainable agriculture