Effect of row space and nitrogen interaction on seed-cotton (Gossypium kirsutum) yield under irrigated conditions of Turkey

This study was conducted during 2001–2002 at the experimental area of Agricultural Research Institute of Kahramanmaras, to determine the effect of nitrogen fertilization (0, 50, 100, 150, 200 and 250 kg/ha) and the different row spaces (60, 70 and 80 cm) on plant height, number of monopodial and sympodial branches, number of bolls/plant, seed-cotton weight and seed-cotton yield and the effect of row spaces x nitrogen interaction in cotton (Gossypium hirsutum L.). Number of monopodial and sympodial branches and seed-cotton yield in 2001 and 2002, and plant height and bolls/plant in 2001 were affected by row spacing. The highest seed-cotton yield was obtained with 60 cm row space. All of the investigated properties except seed-cotton weight/boll were affected by nitrogen application doses and the highest seed-cotton yield was obtained with the 200–250 kg N/ha. The effect of row space x nitrogen interaction was generally significant, except plant height. The result showed that the effect of different nitrogen treatments could be changed according to the different row spaces.