Two field experiments were carried out at El-Sharawy village in ELBostan area-Noubaria Region, Elbeheira governorate Egypt, (Latitude 30° 43' 22.01" N, Longitude 30° 16' 44.50" E), during the two growing successive seasons of 2012/2013 and 2013/2014, to study the effects of compost, nitrogen application levels and Humic substances as foliar sprays on wheat yield as well as some nutrient contents in wheat grain and straw, grain protein content and total carbohydrate of wheat plants (Masr-1 variety). A split-split plot deign with three replicates was used. The main plots were assigned for two rates of compost (0 and 10 m³/fed), the sub-sub plots were assigned for three levels of nitrogen treatments while sub-sub plots were assigned for two K- humate treatments i.e. without addition and foliar application at 2 L fed^-1.  The obtained results revealed that application of compost significantly increased the wheat grain and straw yields and their contents of N, P, K and grain protein. Raising mineral nitrogen fertilizer level from 50 to 75 and 100 % resulted in significant increases in 1000-grain weight, grain and straw yields/fed and protein content of grain and straw as well as N, P and K content in grain and straw. Foliar application of K-humate generally had enhancing effects on wheat productivity and improved its nutrient contents. In this concern, the soil application of 10 m³ compost together with mineral nitrogen fertilizer at of the recommended N 75 or100 % level and 2 L fed^-1 K-humate had the superior impact.