Abstract Promoting the use of agricultural waste is one of the newly prepared water and environment
friendly agriculture strategies in the Kingdom of Saudi Arabia (KSA). The objective of this
research was to study the efficiency of cultivating oyster mushroom (Pleurotus ostreatus) on date
palm wastes mixed with other agricultural wastes available in KSA. Four agricultural wastes were
mixed with date palm leaves at different ratios, with two supplements and three spawn rates were
used. Wheat straw mixed with date palm at ratio of 25