Studies on The Effect of Humates and Microbial Humates on Fruit Quality of Picual and Kalamata Olive Trees

This study was carried out during the two seasons 2014, 2015 on olive trees Picual and Kalamata cv. The trees were 10 years old growing in sandy soil at a private orchard in Ismailia governorate, Egypt. This investigation was performed to study the effect of humates and microbial Humates on olive trees Picual and Kalamata cv. humates and microbial humates (0, 1 and 2 %) was used as foliar application once time at 70 % final fruit size. At the end of the season, Fruit quality: average fruit weight, volume, fruit shape index and pulp\ pit ratio also fruit chemical characterizes: fruit moisture content and oil percentage were recorded. It is clear from data obtained that humates and microbial humates improved Kalamata and Picual fruit quality (Fruit weight, volume, Pulp /Pit ratio and Shape index). Highest oil percentage and lowest moisture content in Kalamata fruit were obtained from olive trees sprayed with microbial humate at high concentration (2%) main while in Picual cv. fruit characterized by highest oil percentage and lowest moisture content was obtained from trees sprayed with humate at high concentration (2%).