Two field experiments were carried out at Sakha  Agricultural Research Station farm, Kafr El-Sheikh Governorate, Egypt (31^o05^' N latitude and 30^o56' E longitude) during the two consecutive summer seasons of 2010 and 2011 using rice (Oryza sativa L.) grains variety (Sakha,101) to study the effect of compost, compost tea and humic substances enriched with potassium or zinc elements under nitrogen forms and levels on rice yield. Split-split plot design was used with four replicates. The main plots were assigned to two nitrogen forms: anhydrous ammonia 82% N (AA) and urea 46.5% N (U). The sub-plots were assigned to three nitrogen levels (30 (N₃₀), 45 (N₄₅), 60 (N₆₀) kg N/ fed.) (fed.= 0.42 ha.). The sub sub-plots were randomly assigned to six treatments (1- control, 2- K-fulvate, 3- compost tea, 4- humic acid, 5- compost, 6- Zn-fulvate). The plot area was 3.5 x 4 = 14 m². Field preparation and nursery practices were performed according to the traditional local management. The results can be summarized as following: 1-No significant differences in grain or straw yield were detected between the two N forms. 2-The values of grain, straw and biological yields increased significantly as N levels increased from N₃₀ to N₄₅ and N₆₀ on average of the two seasons. 3-The treatment of Zn-fulvate significantly increased grain, straw and biological yields on average of the two seasons. 4-The highest grain yield values (4902 kg/fed and 4899 kg/fed.) were obtained under N₆₀ level. of  AA or U fertilizers combined with Zn–fulvate. 5-The highest value of biological yield (12040 kg/fed.) was recorded with Zn-fulvate under AA fertilizer at N₆₀ level. 6-The highest gross return values ( 9804 and 9798 L.E./ fed.) and net return values ( 9554 and 9563 L.E./ fed.) of AA and U fertilizers were obtained at N₆₀ level with Zn-fulvate treatment. 7-The highest increase of net return over control value for AA (1884 L.E./ fed.) was recorded with Zn-fulvate and N₄₅ level, while the highest one for U fertilizer (1232 L.E./ fed.) was obtained as Zn-fulvate used with N₆₀ level.