ORIGINAL ARTICLES Effect of spraying humic acid during fruit set stage on fruit quality and quantity of Picual olive trees grown under Sinai condition

F Laila, Hagagg, Laila, F Hagagg, M Shahin, Maha Afifi, Mahdy, Eman El-Hady
2013 Journal of Applied Sciences Research   unpublished
This study was carried out during the two seasons 2011, 2012 on olive trees Picual cv. the trees were 10 years old growing in sandy soil at private orchard in north Sinai governorate, Egypt. This investigation was performed to study the effect of humic acid as Actosol® (contains 20 % humic acid + NPK 1:5:6) as foliar application on tree (0.125, 0.25 and 0.5 %) at the begging of fruit set stage. At the end of the season, yield (kg/tree) and Fruit quality: average fruit size (volume), weight,
more » ... olume), weight, shape index (length\ diameter) and pulp\pit ratio also fruit chemical characterizes: fruit oil and acidity percentage were recorded. Picual olive trees sprayed with humic acid as foliar application on tree at (0.5 %) at the begging of fruit set obtained the highest yield (kg/tree) as while as average fruit size, weight, and pulp\pit ratio also fruit oil percentage rather than low concentration of humic acid.