Cotton (Gossypium hirsutum L. ) and soybean (Glycine max L.) intercropping systems research was conducted in 2018 at Ege University Faculty of Agriculture. The research was conducted within the Field Crops Department in order to determine the effects of intercropping of cotton and soybean on yield and some agronomical characteristics. In this study, cotton ‘Lima’ variety and soybean ‘Mona’ variety were used as plant materials. Experiment was conducted in a RCBD (Randomized Complete Block Design) in four replication. Cotton and soybean planting patterns were; a) sole cotton (70 cm spaced single rows), b) sole cotton (105-35 cm spaced double rows strips), c) cotton intercropped with soybeans in a 1:1 row ratio (35 cm spaced rows), d) cotton intercropped with soybean in a 2:2 row ratio (35 cm spaced rows) and e) sole soybean (70 cm spaced rows). According to the average data that obtained from this study, plant height of cotton ranged between 65.25-72.85 cm, bolls plant^-1 of cotton ranged between 9.00- 13.95, seed cotton yield ranged between 185.90- 471.00 kg da^-1. Plant height of soyben ranged between 61.95-70.55 cm, seed yield of soybean ranged between 241.63-452.83 kg da^-1. The best results in cotton were generally obtained from the sole cotton 105-35 cm spaced double rows strips and in soybean, obtained from sole soybean planting. It was determined that LER (Land Equivalent Ratio) value ranged between 1.15-1.55 at different planting systems. It was concluded that the cotton intercropped with soybean in a 2:2 row ratio would be useful.

Keywords: Agronomical characteristics, cotton, intercropping, soybean