Two Field experiments were implemented at the experimental farm during the 19999/2000 and 2000/2001 growing seasons. The study aimed to evaluate the residual effect of untraditional organic fertilizers (town refuse compost, restaurant leftover, fertiplus and sheep manure) with or without inorganic fertilizers (NPK) applied to Potato the previous seasons on the growth and yield of wheat and on some soil properties. Twenty-two and six treatments in the first and second seasons respectively were used in a Randomized Complete Block Design (RCBD) with four replications. The results of the 1999/2000 season showed that residual effect of organic amendments treatments significantly increased biological yield and spike length and non-significantly increased grain yield, number of grains per spike, plant height and number of tillers per plant. Some treatments gave higher grain yield ranging between 2.718-2.980 t/ha, while the control treatment gave the lowest grain yield (1.954 t/ha). In the 2000/2001 season, the treatment (15t/ha sheep manure +NPK) gave the highest biological and grain yield and the highest mean grain yield of the two seasons. While the lowest were observed under the control treatment. The residual effects of organic fertilizers treatments significantly increased both soil organic matter percentage and available soil–phosphorus and non-significantly increased soil pH and EC.

Key Words :Fertiplus, Environment, Residual Effect, Restaurant leftover, Sheep manure.